{"id":4758,"date":"2026-07-16T23:11:56","date_gmt":"2026-07-16T20:11:56","guid":{"rendered":"https:\/\/ibonav.aero\/learn\/?p=4758"},"modified":"2026-07-27T21:43:47","modified_gmt":"2026-07-27T18:43:47","slug":"b737-anten-sistemlerinin-aerodinamik-mimarisi-ve-elektromanyetik-islevi-wxr-ils-radalt-dme-vor-hf-vswr-p-static-icao-boeing","status":"publish","type":"post","link":"https:\/\/ibonav.aero\/learn\/b737-anten-sistemlerinin-aerodinamik-mimarisi-ve-elektromanyetik-islevi-wxr-ils-radalt-dme-vor-hf-vswr-p-static-icao-boeing\/","title":{"rendered":"B737 Anten Sistemlerinin Aerodinamik Mimarisi ve Elektromanyetik \u0130\u015flevi \/ WXR \u2013 ILS, RADALT \u2013 DME, VOR \u2013 HF, VSWR \u2013 P-Static | ICAO &amp; Boeing"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_88 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u0130\u00e7indekiler:<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"\u0130\u00e7indekiler Tablosunu A\u00e7\/Kapat\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/ibonav.aero\/learn\/b737-anten-sistemlerinin-aerodinamik-mimarisi-ve-elektromanyetik-islevi-wxr-ils-radalt-dme-vor-hf-vswr-p-static-icao-boeing\/#Giris\" >Giri\u015f<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/ibonav.aero\/learn\/b737-anten-sistemlerinin-aerodinamik-mimarisi-ve-elektromanyetik-islevi-wxr-ils-radalt-dme-vor-hf-vswr-p-static-icao-boeing\/#10_Tartisma_Basligi_Gorunmez_Tehdit_Sinir_Tabaka_Fizigi_ve_Aerodinamik_Kriz\" >1.0 Tart\u0131\u015fma Ba\u015fl\u0131\u011f\u0131: G\u00f6r\u00fcnmez Tehdit, S\u0131n\u0131r Tabaka Fizi\u011fi ve Aerodinamik Kriz<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/ibonav.aero\/learn\/b737-anten-sistemlerinin-aerodinamik-mimarisi-ve-elektromanyetik-islevi-wxr-ils-radalt-dme-vor-hf-vswr-p-static-icao-boeing\/#20_Burun_Yapisi_Radome_Mimarisi_Malzeme_Fizigi_ve_Elektromanyetik_Gecirgenlik_Transmissivity\" >2.0 Burun Yap\u0131s\u0131 (Radome) Mimarisi, Malzeme Fizi\u011fi ve Elektromanyetik Ge\u00e7irgenlik (Transmissivity)<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Giris\"><\/span><strong>Giri\u015f<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Havac\u0131l\u0131k end\u00fcstrisinde, devasa turbofan motorlar\u0131n \u00fcretti\u011fi muazzam itki g\u00fcc\u00fc veya kanat profillerinin yaratt\u0131\u011f\u0131 ta\u015f\u0131ma (<em>lift<\/em>) kuvveti her zaman spot \u0131\u015f\u0131klar\u0131n\u0131n alt\u0131ndad\u0131r. Bir Boeing 737&#8217;nin rampadan ayr\u0131l\u0131\u015f\u0131ndan ini\u015fine kadar ge\u00e7en s\u00fcre\u00e7te, fiziksel yap\u0131sal b\u00fct\u00fcnl\u00fck genellikle sadece kaporta, hidrolik veya motor sistemleri \u00fczerinden de\u011ferlendirilir. Ancak okyanusun ortas\u0131nda, FL350 seviyesinde u\u00e7an 70 tonluk bas\u0131n\u00e7l\u0131 bir metal y\u0131\u011f\u0131n\u0131n\u0131 hayatta tutan ve onu &#8220;k\u00f6r&#8221; bir k\u00fctle olmaktan \u00e7\u0131karan as\u0131l unsur; u\u00e7a\u011f\u0131n g\u00f6vdesine gizlenmi\u015f, kaportas\u0131na g\u00f6m\u00fclm\u00fc\u015f veya s\u0131n\u0131r tabakay\u0131 (<em>boundary layer<\/em>) delip d\u0131\u015far\u0131 uzanm\u0131\u015f o g\u00f6r\u00fcnmez elektromanyetik a\u011fd\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Genel havac\u0131l\u0131k literat\u00fcr\u00fc ve standart e\u011fitim mod\u00fclleri, anten sistemlerini genellikle &#8220;aviyonik&#8221; ba\u015fl\u0131\u011f\u0131 alt\u0131nda, sadece hangi frekansta \u00e7al\u0131\u015ft\u0131klar\u0131n\u0131 ve kokpitte hangi ekrana veri verdiklerini anlatan y\u00fczeysel bir elektronik donan\u0131m olarak s\u0131n\u0131fland\u0131rma e\u011filimindedir. Oysa bir u\u00e7ak tasar\u0131m m\u00fchendisi veya u\u00e7u\u015f operasyon (<em>Flight Ops<\/em>) uzman\u0131 i\u00e7in ger\u00e7ekler \u00e7ok daha karanl\u0131kt\u0131r: U\u00e7a\u011f\u0131n d\u0131\u015f y\u00fczeyine eklenen milimetrik bir anten \u00e7\u0131k\u0131nt\u0131s\u0131 bile sadece bir telsiz par\u00e7as\u0131 de\u011fil; aerodinamik bir s\u00fcrt\u00fcnme (<em>parasite drag<\/em>) kayna\u011f\u0131, bir t\u00fcrb\u00fclans jenerat\u00f6r\u00fc ve d\u0131\u015f \u00e7evrenin termodinamik y\u0131k\u0131m\u0131na do\u011frudan maruz kalan kritik bir kriz merkezidir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu makalede, klasik ezberlerin ve standart tan\u0131mlar\u0131n tamamen d\u0131\u015f\u0131na \u00e7\u0131k\u0131yoruz. B737 u\u00e7aklar\u0131 \u00f6zelinde anten sistemlerinin r\u00fczgar t\u00fcnellerindeki o ac\u0131mas\u0131z aerodinamik sava\u015f\u0131n\u0131, <strong><em>PIP<\/em><\/strong> (Performance Improvement Package) ve <strong><em>SFP<\/em><\/strong> (Short Field Performance) [K\u0131sa Pist Performans\u0131] modifikasyonlar\u0131n\u0131n h\u00fccum a\u00e7\u0131lar\u0131na yapt\u0131\u011f\u0131 m\u00fcdahalelerin yaratt\u0131\u011f\u0131 geometrik g\u00f6lgelenmeleri (<em>shadowing<\/em>) ve buzlanma (<em>icing<\/em>) \u015fartlar\u0131nda kokpiti nas\u0131l tamamen sa\u011f\u0131r b\u0131rakt\u0131\u011f\u0131n\u0131 inceleyece\u011fiz.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mesele sadece bir antenin \u00e7al\u0131\u015f\u0131p \u00e7al\u0131\u015fmamas\u0131 de\u011fildir; mesele kumpas\u0131n onda biri hassasiyetindeki \u00f6l\u00e7\u00fcm hatalar\u0131n\u0131n, <em>empedans<\/em> uyumsuzluklar\u0131n\u0131n ve u\u00e7u\u015f hatt\u0131ndaki <strong><em>SMS<\/em><\/strong> (Safety Management System) [Emniyet Y\u00f6netim Sistemi] ihlallerinin; ICAO (International Civil Aviation Organization) [Uluslararas\u0131 Sivil Havac\u0131l\u0131k \u00d6rg\u00fct\u00fc] standartlar\u0131ndaki CAT III yakla\u015fma kabiliyetini nas\u0131l yerle bir etti\u011fidir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u015eimdi, t\u00fcm bu elektronik ve fiziksel kaosu anlamak i\u00e7in, sistemin k\u00f6klerine; u\u00e7a\u011f\u0131n aerodinamik s\u0131n\u0131r tabakas\u0131 i\u00e7indeki o g\u00f6r\u00fcnmez tehdit senaryosuna do\u011fru ini\u015f yap\u0131yoruz.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"10_Tartisma_Basligi_Gorunmez_Tehdit_Sinir_Tabaka_Fizigi_ve_Aerodinamik_Kriz\"><\/span><strong>1.0 Tart\u0131\u015fma Ba\u015fl\u0131\u011f\u0131: G\u00f6r\u00fcnmez Tehdit, S\u0131n\u0131r Tabaka Fizi\u011fi ve Aerodinamik Kriz<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Bir Boeing 737&#8217;nin g\u00f6vdesine d\u0131\u015far\u0131dan bak\u0131ld\u0131\u011f\u0131nda, antenler genellikle devasa al\u00fcminyum veya kompozit yap\u0131 i\u00e7erisinde k\u00fc\u00e7\u00fck, \u00f6nemsiz birer \u00e7\u0131k\u0131nt\u0131 gibi alg\u0131lanabilir. Ancak r\u00fczgar t\u00fcneli testlerinde ve hesaplamal\u0131 ak\u0131\u015fkanlar dinami\u011fi (<em>CFD<\/em>) analizlerinde, g\u00f6vde \u00fczerine eklenecek milimetrik bir k\u00fctle bile u\u00e7u\u015fun aerodinamik karakteristi\u011fini k\u00f6kten de\u011fi\u015ftiren bir de\u011fi\u015fkendir. Konuya standart sistem anlat\u0131m\u0131ndan farkl\u0131 olarak, bir antenin havayla olan \u00f6l\u00fcmc\u00fcl dans\u0131n\u0131 tamamen aerodinamik ve termodinamik bir kriz senaryosu \u00fczerinden inceleyerek giri\u015f yap\u0131yoruz.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1.1 Senaryo: <em>Severe Icing<\/em> Ko\u015fullar\u0131nda Anten Kineti\u011fi ve Termodinamik Bozulma<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">U\u00e7u\u015f seviyesi FL350&#8217;de, <em>Instrument Meteorological Conditions<\/em> (IMC) [Aletli Meteorolojik \u015eartlar] alt\u0131nda Mach 0.78 h\u0131zla seyreden bir B737&#8217;nin, meteorolojik radarda <strong><em>WXR<\/em><\/strong> (Weather Radar) [Hava Radar\u0131] zay\u0131f bir ekoya sahip olmas\u0131na ra\u011fmen asl\u0131nda a\u015f\u0131r\u0131 so\u011fumu\u015f iri su damlac\u0131klar\u0131 (<em>Supercooled Large Droplets<\/em> &#8211; SLD) bar\u0131nd\u0131ran aktif bir bulut h\u00fccresine girdi\u011fini varsayal\u0131m.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu spesifik atmosferik ko\u015fulda su damlac\u0131klar\u0131 tamamen s\u0131v\u0131 formda bulunmalar\u0131na ra\u011fmen, s\u0131cakl\u0131klar\u0131 0 \u00b0C&#8217;nin (santigrat) \u00e7ok alt\u0131ndad\u0131r. U\u00e7a\u011f\u0131n g\u00f6vde y\u00fczeyine, \u00f6zellikle de aerodinamik direnci k\u0131rmak i\u00e7in dar ve keskin bir profil sunan <em>blade<\/em> (b\u0131\u00e7ak) tipi <strong><em>VHF<\/em><\/strong> (Very High Frequency) [\u00c7ok Y\u00fcksek Frekans] antenlerinin h\u00fccum kenar\u0131na (<em>leading edge<\/em>) \u00e7arpt\u0131klar\u0131 an, kinetik enerjinin \u0131s\u0131ya d\u00f6n\u00fc\u015f\u00fcm\u00fc ve termodinamik \u015fok ile milisaniyeler i\u00e7inde donarak <em>clear ice<\/em> (\u015feffaf buz) tabakas\u0131 olu\u015ftururlar.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1.1.1 Aerodinamik Profilin \u0130flas\u0131 ve S\u0131n\u0131r Tabaka (<em>Boundary Layer<\/em>) \u0130\u00e7erisindeki Kaos<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bir <strong><em>VHF<\/em><\/strong> anteni, seyir h\u0131z\u0131nda olu\u015fan form s\u00fcr\u00fcklemesini (<em>form drag<\/em>) en aza indirmek i\u00e7in genellikle damla (<em>teardrop<\/em>) veya geriye do\u011fru ok a\u00e7\u0131l\u0131 (<em>swept-back<\/em>) bir kanat profili (<em>airfoil<\/em>) \u015feklinde \u00fcretilir. Havan\u0131n anten y\u00fczeyine ilk temas etti\u011fi noktadan, y\u00fczeyi terk etti\u011fi firar kenar\u0131 (<em>trailing edge<\/em>) noktas\u0131na kadar olan ak\u0131\u015f, ideal \u015fartlarda <em>laminar<\/em> (d\u00fczenli, katmanl\u0131 ve p\u00fcr\u00fczs\u00fcz) olmak zorundad\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ancak <em>clear ice<\/em> birikimi (<em>ice accretion<\/em>) ba\u015flad\u0131\u011f\u0131nda, bu hesaplanm\u0131\u015f p\u00fcr\u00fczs\u00fcz y\u00fczey aniden d\u00fczensiz, p\u00fct\u00fcrl\u00fc ve aerodinamik a\u00e7\u0131dan tamamen &#8220;k\u00f6r&#8221; bir forma b\u00fcr\u00fcn\u00fcr. U\u00e7ak g\u00f6vdesinin hemen \u00fczerinde akan havan\u0131n h\u0131z\u0131, y\u00fczeye s\u00fcrt\u00fcnmeden dolay\u0131 s\u0131f\u0131rd\u0131r; ancak y\u00fczeyden birka\u00e7 santimetre yukar\u0131 \u00e7\u0131k\u0131ld\u0131k\u00e7a serbest hava ak\u0131m\u0131 h\u0131z\u0131na (<em>free stream velocity<\/em>) ula\u015f\u0131r. Bu keskin h\u0131z de\u011fi\u015fiminin ya\u015fand\u0131\u011f\u0131 dikey b\u00f6lgeye <em>boundary layer<\/em> (s\u0131n\u0131r tabaka) denir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hava ak\u0131\u015f\u0131, buzlanm\u0131\u015f p\u00fct\u00fcrl\u00fc h\u00fccum kenar\u0131na \u00e7arpt\u0131\u011f\u0131 anda s\u0131n\u0131r tabaka i\u00e7erisindeki enerjisini kaybeder ve <em>laminar<\/em> formdan \u015fiddetli bir <em>turbulent<\/em> (t\u00fcrb\u00fclansl\u0131) ak\u0131\u015fa ayr\u0131\u015f\u0131r. Bu ak\u0131\u015f kopmas\u0131 (<em>flow separation<\/em>), antenin hemen arkas\u0131nda devasa bir d\u00fc\u015f\u00fck bas\u0131n\u00e7 alan\u0131, yani girdaplar dizisi (<em>wake turbulence<\/em> veya <em>Karman vortex street<\/em>) yarat\u0131r. \u0130leriye do\u011fru hareket eden u\u00e7a\u011f\u0131 z\u0131t y\u00f6nde, geriye do\u011fru as\u0131lan bu devasa kuvvete <em>parasite drag<\/em> (parazit s\u00fcr\u00fckleme) ad\u0131 verilir. Anten \u00fczerinde biriken buzun asimetrik kal\u0131nl\u0131\u011f\u0131 artt\u0131k\u00e7a, antenin g\u00f6vdeye uygulad\u0131\u011f\u0131 tork ve s\u00fcr\u00fckleme kuvveti logaritmik bir ivmeyle y\u00fckselir<em><sub>FAA AC 20-117.<\/sub><\/em><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1.2 <em>Flutter<\/em> (\u00c7\u0131rp\u0131nma) Olgusu, Rezonans Felaketi ve Mekanik Toleranslar<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Aerodinami\u011fin yap\u0131lar \u00fczerindeki en y\u0131k\u0131c\u0131 etkisi olan <em>flutter<\/em> olgusu, hava ak\u0131\u015f\u0131n\u0131n koptu\u011fu bu noktada devreye girer. Buzlanma nedeniyle antenin arkas\u0131nda olu\u015fan d\u00fczensiz girdaplar, antenin g\u00f6vdesini saniyede y\u00fczlerce kez sa\u011fa ve sola asimetrik olarak tokatlamaya ba\u015flar. Bu aerodinamik tokatlama frekans\u0131, e\u011fer antenin kendi yap\u0131sal do\u011fal frekans\u0131na (<em>natural frequency<\/em>) denk gelirse, sistem kontrol edilemez bir &#8220;rezonans&#8221; durumuna ge\u00e7er.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1.2.1 Yap\u0131sal Yorulma (<em>Structural Fatigue<\/em>) ve Bak\u0131m Kriterlerinin Emniyete Etkisi<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Rezonansa giren bir anten, u\u00e7a\u011f\u0131n kaportas\u0131na ba\u011fland\u0131\u011f\u0131 noktada devasa bir kesme stresi (<em>shear stress<\/em>) olu\u015fturur. Bu antenler genellikle 4 veya 6 adet y\u00fcksek mukavemetli titanyum ala\u015f\u0131ml\u0131 c\u0131vata ile g\u00f6vdeye sabitlenir ve araya korozyonu \u00f6nlemek amac\u0131yla havac\u0131l\u0131k standartlar\u0131nda <em>polysulfide sealant<\/em> (polis\u00fclfit s\u0131zd\u0131rmazl\u0131k bile\u015fi\u011fi) uygulan\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu noktada bak\u0131m a\u015famas\u0131ndaki fiziksel limitlerin do\u011frulu\u011fu \u00f6l\u00fcmc\u00fcl bir \u00f6neme sahiptir. \u00d6rne\u011fin, antenin h\u00fccum kenar\u0131ndaki (<em>leading edge<\/em>) erozyon veya yap\u0131sal kal\u0131nl\u0131k \u00f6l\u00e7\u00fcm\u00fc s\u0131ras\u0131nda, bak\u0131m teknisyeninin kumpas de\u011ferini do\u011fru okumas\u0131 \u015fartt\u0131r. Limit de\u011ferin 13.20 mm oldu\u011fu bir \u00f6l\u00e7\u00fcmde, kumpastaki de\u011ferin yanl\u0131\u015fl\u0131kla 12.40 mm olarak yorumlanmas\u0131 ya da kaydedilmesi, asl\u0131nda tolerans d\u0131\u015f\u0131na \u00e7\u0131km\u0131\u015f ve aerodinamik merkezini (<em>center of pressure<\/em>) kaybetmi\u015f bir antenin u\u00e7u\u015fa verilmesi anlam\u0131na gelir. Hatal\u0131 \u00f6l\u00e7\u00fclm\u00fc\u015f bu yap\u0131, <em>severe icing<\/em> senaryosunda ortaya \u00e7\u0131kan rezonansa kar\u015f\u0131 tamamen savunmas\u0131zd\u0131r. Anten taban\u0131ndaki al\u00fcminyum g\u00f6vde esnemeye ba\u015flar ve metal yorgunlu\u011fu (<em>metal fatigue<\/em>) \u00e7ok k\u0131sa s\u00fcrede mikro \u00e7atlaklara (<em>microcracks<\/em>) d\u00f6n\u00fc\u015f\u00fcr<em><sub>Boeing 737 AMM 53-00-00.<\/sub><\/em><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1.3 Kokpitteki Alg\u0131 ve Sistemsel \u00c7\u00f6k\u00fc\u015f: Telsiz Neden Susar?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Anten g\u00f6vdeden fiziksel olarak tamamen kopmasa dahi, a\u015f\u0131r\u0131 <em>flutter<\/em> titre\u015fimi nedeniyle antenin i\u00e7 yap\u0131s\u0131ndaki dielektrik (yal\u0131tkan) seramikler \u00e7atlar. Anten ile u\u00e7a\u011f\u0131n g\u00f6vdesi aras\u0131ndaki topraklama (<em>bonding<\/em>) hatt\u0131 zarar g\u00f6rd\u00fc\u011f\u00fc anda, antenin 50 Ohm olarak sabitlenmi\u015f <em>empedans<\/em> (impedance) dengesi yerle bir olur.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pilotlar bu yap\u0131sal y\u0131k\u0131m\u0131 kokpitten g\u00f6rsel olarak alg\u0131layamazlar. Ekipler, durumu <strong><em>ATC<\/em><\/strong> (Air Traffic Control) [Hava Trafik Kontrol\u00fc] \u00fcnitesine raporlamak i\u00e7in radyoyu kullanmak istediklerinde sistem, \u00fcretilen radyo frekans g\u00fcc\u00fcn\u00fc koaksiyel kablo \u00fczerinden antene yollar. Ancak antenin k\u0131r\u0131lm\u0131\u015f i\u00e7 yap\u0131s\u0131 bu g\u00fcc\u00fc atmosfere yayamad\u0131\u011f\u0131 i\u00e7in, g\u00f6nderilen sinyal antenin taban\u0131ndan seker ve koaksiyel kablo boyunca telsiz \u00fcnitesine geri d\u00f6ner. Bu duruma havac\u0131l\u0131k frekans teorisinde <em>Reflected Power<\/em> (Yans\u0131yan G\u00fc\u00e7) veya y\u00fcksek <em>VSWR<\/em> (Voltage Standing Wave Ratio) [Gerilim Duran Dalga Oran\u0131] ad\u0131 verilir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Yans\u0131yan bu \u00f6l\u00fcmc\u00fcl enerji, telsiz \u00fcnitesinin (<em>LRU<\/em>) i\u00e7indeki verici (<em>transmitter<\/em>) kat\u0131n\u0131 saniyeler i\u00e7inde a\u015f\u0131r\u0131 \u0131s\u0131yla kavurur. Sonu\u00e7 olarak, g\u00f6vde \u00fczerindeki basit bir milimetrik \u00f6l\u00e7\u00fcm hatas\u0131n\u0131n, hatal\u0131 raporlaman\u0131n ve aerodinamik buzlanman\u0131n bir araya gelmesiyle u\u00e7ak tamamen sa\u011f\u0131r kal\u0131r. Bu tip birbirini tetikleyen ard\u0131\u015f\u0131k hata zincirlerinin (<em>error chain<\/em>) \u00f6nlenmesi, organizasyonlar i\u00e7indeki <strong><em>SMS<\/em><\/strong> (Safety Management System) [Emniyet Y\u00f6netim Sistemi] prosed\u00fcrlerinin ve raporlama k\u00fclt\u00fcr\u00fcn\u00fcn tavizsiz bir \u015fekilde uygulanmas\u0131 ile do\u011frudan ili\u015fkilidir<em><sub>ICAO Doc 9859 SMS Manual.<\/sub><\/em><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"20_Burun_Yapisi_Radome_Mimarisi_Malzeme_Fizigi_ve_Elektromanyetik_Gecirgenlik_Transmissivity\"><\/span><strong>2.0 Burun Yap\u0131s\u0131 (<em>Radome<\/em>) Mimarisi, Malzeme Fizi\u011fi ve Elektromanyetik Ge\u00e7irgenlik (<em>Transmissivity<\/em>)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Bir Boeing 737 u\u00e7a\u011f\u0131n\u0131n burun konisi, u\u00e7u\u015f hatt\u0131nda sadece aerodinamik bir yarma (<em>streamlining<\/em>) g\u00f6revi g\u00f6rmez; ayn\u0131 zamanda u\u00e7a\u011f\u0131n en kritik navigasyon ve g\u00f6zlem donan\u0131mlar\u0131na ev sahipli\u011fi yapan, \u00e7evresel \u015fartlara kar\u015f\u0131 z\u0131rh g\u00f6revi \u00fcstlenen ancak elektromanyetik olarak &#8220;g\u00f6r\u00fcnmez&#8221; olmas\u0131 istenen paradoksal bir yap\u0131d\u0131r. Bu yap\u0131ya havac\u0131l\u0131k terminolojisinde <em>radome<\/em> (radar dome \/ radar kapa\u011f\u0131) ad\u0131 verilir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">R\u00fczgar t\u00fcnellerinde Mach 0.82 gibi h\u0131zlarda aerodinamik formunu koruyacak kadar rijit, buz kristalleri ve dolu tanelerinin saatte 800 kilometre h\u0131zla \u00e7arpmas\u0131na dayanacak kadar esnek, ancak mikrodalga ve radyo frekanslar\u0131n\u0131n kay\u0131ps\u0131z ge\u00e7mesine izin verecek kadar \u015feffaf bir y\u00fczey tasarlamak, malzeme biliminin en karanl\u0131k alanlar\u0131ndan biridir.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2.1 Malzeme Bilimi, Dielektrik Sabiti ve <em>Faraday<\/em> Kafesi \u0130zolasyonu<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Modern sivil havac\u0131l\u0131kta a\u011f\u0131rl\u0131k tasarrufu i\u00e7in g\u00f6vdenin bir\u00e7ok yerinde karbon fiber kompozitler kullan\u0131lmaktad\u0131r. Ancak <em>radome<\/em> \u00fcretiminde karbon fiber kullan\u0131lmas\u0131 kesinlikle yasakt\u0131r. Karbon elementinin atomik yap\u0131s\u0131, elektriksel olarak iletkendir ve kendisine \u00e7arpan mikrodalga veya radyo frekanslar\u0131n\u0131 t\u0131pk\u0131 bir ayna gibi geri yans\u0131t\u0131r. E\u011fer bir B737&#8217;nin burnu karbon fiberden \u00fcretilseydi, u\u00e7a\u011f\u0131n i\u00e7erisindeki antenler devasa bir <em>Faraday<\/em> kafesine hapsedilecek ve u\u00e7ak elektromanyetik olarak tamamen k\u00f6r olacakt\u0131.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu m\u00fchendislik krizini a\u015fmak i\u00e7in <em>radome<\/em> y\u00fczeyi; <em>quartz<\/em> (kuvars), <em>fiberglass<\/em> (cam elyaf\u0131) veya <em>Kevlar<\/em> gibi tamamen <em>dielectric<\/em> (yal\u0131tkan) malzemelerden olu\u015fan, genellikle <em>honeycomb<\/em> (bal pete\u011fi) \u00e7ekirdek yap\u0131s\u0131na sahip \u00e7ok katmanl\u0131 sandvi\u00e7 (<em>sandwich panel<\/em>) paneller \u015feklinde \u00fcretilir. Bu panellerin en kritik de\u011fi\u015fkeni &#8220;Dielektrik Sabiti&#8221;dir. Malzemenin kal\u0131nl\u0131\u011f\u0131, i\u00e7erisinden ge\u00e7ecek olan X-Band (yakla\u015f\u0131k 9.3 GHz) mikrodalga dalga boyunun (lambda) belirli bir fraksiyonuna g\u00f6re (genellikle lambda \/ 2 kural\u0131) hesaplanarak \u00fcretilir. Bu sayede elektromanyetik dalgan\u0131n kapa\u011f\u0131 delip ge\u00e7erken u\u011frayaca\u011f\u0131 <em>insertion loss<\/em> (ekleme kayb\u0131) de\u011feri <code>[0, 0.5]<\/code> desibel gibi minimal bir aral\u0131kta tutulur<em><sub>Boeing 737 AMM 53-10-00.<\/sub><\/em><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2.2 <em>Delamination<\/em> (Katman Ayr\u0131\u015fmas\u0131) ve Su Bariyeri Fizi\u011fi<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">U\u00e7u\u015f s\u0131ras\u0131nda <em>radome<\/em> y\u00fczeyi sadece r\u00fczgara de\u011fil, ayn\u0131 zamanda \u015fiddetli ya\u011fmur ve termal \u015foklara maruz kal\u0131r. Zamanla kompozit y\u00fczeyde olu\u015fan mikro \u00e7atlaklardan i\u00e7eri s\u0131zan nem, <em>honeycomb<\/em> peteklerinin i\u00e7ine yerle\u015fir. U\u00e7ak y\u00fcksek irtifalara t\u0131rmand\u0131\u011f\u0131nda d\u0131\u015f s\u0131cakl\u0131k -50 santigrat derecelere d\u00fc\u015fer ve peteklerin i\u00e7indeki su aniden donarak genle\u015fir. Bu genle\u015fme, kompozit katmanlar\u0131 i\u00e7eriden patlatarak <em>delamination<\/em> (katman ayr\u0131\u015fmas\u0131) ad\u0131 verilen yap\u0131sal y\u0131k\u0131ma neden olur.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Daha da tehlikelisi, suyun dielektrik sabiti havan\u0131nkinden yakla\u015f\u0131k 80 kat daha fazlad\u0131r. <em>Radome<\/em> i\u00e7ine hapsolan su cepleri, i\u00e7erideki antenlerin yayd\u0131\u011f\u0131 veya ald\u0131\u011f\u0131 elektromanyetik sinyaller i\u00e7in a\u015f\u0131lmaz birer k\u00f6r nokta (<em>blind spot<\/em>) yarat\u0131r. Bu durum, kokpitteki radar ekran\u0131nda sahte f\u0131rt\u0131na h\u00fccreleri g\u00f6r\u00fclmesine ya da ger\u00e7ek f\u0131rt\u0131na h\u00fccrelerinin (\u00f6zellikle <em>attenuation<\/em> arkas\u0131nda kalanlar\u0131n) tamamen g\u00f6r\u00fcnmez olmas\u0131na yol a\u00e7arak u\u00e7u\u015f emniyetini kritik seviyede tehlikeye atar.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2.3 <em>WXR<\/em> (Weather Radar) [Hava Radar\u0131] ve <em>Waveguide<\/em> (Dalga K\u0131lavuzu) Matemati\u011fi<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Radome<\/em> kapa\u011f\u0131n\u0131n hemen arkas\u0131nda u\u00e7a\u011f\u0131n en b\u00fcy\u00fck, en karma\u015f\u0131k ve en y\u00fcksek tepe g\u00fcc\u00fcyle \u00e7al\u0131\u015fan anteni olan <strong><em>WXR<\/em><\/strong> bulunur. B737 sistemlerinde bu anten genellikle <em>flat plate<\/em> (d\u00fcz plaka) yap\u0131s\u0131ndad\u0131r ve hidrolik veya step motorlarla hem yatay (<em>azimuth<\/em>) hem de dikey (<em>elevation<\/em>) eksende s\u00fcrekli hareket ederek atmosferi tarar.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sistem mikrodalga frekanslar\u0131nda \u00e7al\u0131\u015f\u0131r. Bu kadar y\u00fcksek frekansl\u0131 bir sinyali, geleneksel koaksiyel kablolarla ta\u015f\u0131mak kablo i\u00e7indeki <em>skin effect<\/em> (y\u00fczey etkisi) ve dielektrik kay\u0131plar nedeniyle imkans\u0131zd\u0131r. Sinyal kabloyu eritir. Bu nedenle anten ile radyo al\u0131c\u0131\/verici \u00fcnitesi (<em>RTR<\/em>) aras\u0131nda i\u00e7i bo\u015f, dikd\u00f6rtgen veya eliptik kesitli bak\u0131r borular olan <em>waveguide<\/em> (dalga k\u0131lavuzu) donan\u0131mlar\u0131 kullan\u0131l\u0131r. Radar sinyalinin hedeften d\u00f6nen g\u00fcc\u00fc (<strong>P<\/strong><sub><strong>r<\/strong><\/sub>), ideal \u015fartlarda a\u015fa\u011f\u0131daki Radar Denklemi ile hesaplan\u0131r:<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"169\" height=\"71\" src=\"https:\/\/ibonav.aero\/learn\/wp-content\/uploads\/2026\/07\/image.png\" alt=\"\" class=\"wp-image-4759\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Denklemdeki <strong>R<\/strong><sup>4 <\/sup>\u00e7arpan\u0131, f\u0131rt\u0131na h\u00fccresine olan mesafenin iki kat\u0131na \u00e7\u0131kmas\u0131 durumunda, antene geri d\u00f6nen sinyal g\u00fcc\u00fcn\u00fcn on alt\u0131 kat azalaca\u011f\u0131n\u0131 g\u00f6sterir. Bu devasa g\u00fc\u00e7 kayb\u0131, antenin u\u00e7a\u011f\u0131n en \u00f6n\u00fcnde, hi\u00e7bir aerodinamik metal engele veya <em>shadowing<\/em> (g\u00f6lgeleme) etkisine maruz kalmadan \u00e7al\u0131\u015fmas\u0131n\u0131 mecburi k\u0131lar.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2.4 Statik De\u015farj ve <em>Lightning Diverter<\/em> (Y\u0131ld\u0131r\u0131m Sapt\u0131r\u0131c\u0131) Zorunluluklar\u0131<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Radome<\/em> yal\u0131tkan bir kompozit oldu\u011fu i\u00e7in, u\u00e7ak saniyede 250 metre h\u0131zla bulutlar\u0131n i\u00e7inden ge\u00e7erken havadaki toz, buz ve ya\u011fmur kristalleriyle s\u00fcrt\u00fcn\u00fcr. Bu s\u00fcrt\u00fcnme (<em>triboelectric effect<\/em>), kapa\u011f\u0131n \u00fczerinde milyonlarca voltluk statik elektrik biriktirir (<em>P-Static<\/em> veya <em>Precipitation Static<\/em>) [Ya\u011f\u0131\u015f Stati\u011fi].<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Yal\u0131tkan y\u00fczey bu elektronlar\u0131 u\u00e7a\u011f\u0131n metal g\u00f6vdesine (<em>airframe<\/em>) iletemez. E\u011fer bu muazzam enerji kontroll\u00fc \u015fekilde bo\u015falt\u0131lmazsa, kapa\u011f\u0131n en sivri noktalar\u0131ndan havaya <em>corona discharge<\/em> (korona de\u015farj\u0131) k\u0131v\u0131lc\u0131mlar\u0131 atlar. Bu k\u0131v\u0131lc\u0131mlar inan\u0131lmaz d\u00fczeyde y\u00fcksek frekansl\u0131 bir elektromanyetik g\u00fcr\u00fclt\u00fc (<em>broadband noise<\/em>) yarat\u0131r ve hem radar\u0131n zay\u0131f d\u00f6n\u00fc\u015f sinyallerini hem de <em>radome<\/em> alt\u0131ndaki <strong><em>ILS<\/em><\/strong> sinyallerini tamamen bast\u0131r\u0131r (sa\u011f\u0131r eder).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu felaketi \u00f6nlemek i\u00e7in <em>radome<\/em> d\u0131\u015f y\u00fczeyine, merkeze yak\u0131n bir noktadan geriye, metal g\u00f6vdeye do\u011fru uzanan <em>lightning diverter strip<\/em> (y\u0131ld\u0131r\u0131m sapt\u0131r\u0131c\u0131 \u015feritler) yap\u0131\u015ft\u0131r\u0131l\u0131r. \u00dczerinde mikroskobik al\u00fcminyum noktac\u0131klar bulunan bu \u015feritler, statik enerjiyi havaya atlamadan \u00f6nce yakalar ve g\u00fcvenli bir \u015fekilde u\u00e7a\u011f\u0131n g\u00f6vde \u015fasesine aktar\u0131r. Bak\u0131m personelinin A-Check periyotlar\u0131nda bu \u015feritlerin y\u00fczey direncini miliohmmetre ile \u00f6l\u00e7mesi ve direncin s\u0131f\u0131ra yak\u0131n (genellikle &lt; 0.1 ohm) bir iletkenlikte oldu\u011funu do\u011frulamas\u0131 mutlak bir zorunlulukturF<em><sub>AA-H-8083-30B.<\/sub><\/em><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3.0 <em>ILS<\/em> (Instrument Landing System) [Aletli \u0130ni\u015f Sistemi] Geometrisi ve <em>Radome<\/em> Entegrasyonu<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">E\u011fer bir u\u00e7u\u015fun en rutin k\u0131sm\u0131 d\u00fcz u\u00e7u\u015f ise, en \u00f6l\u00fcmc\u00fcl ve milimetrik hata kabul etmeyen faz\u0131 CAT III (Kategori 3) \u015fartlar\u0131nda yap\u0131lan s\u0131f\u0131r g\u00f6r\u00fc\u015f (<em>zero visibility<\/em>) otomatik ini\u015fleridir (<em>autoland<\/em>). Bu operasyonu m\u00fcmk\u00fcn k\u0131lan <strong><em>ILS<\/em><\/strong> sisteminin antenleri, <em>radome<\/em> i\u00e7erisindeki devasa hava radar\u0131n\u0131n hemen alt\u0131na veya burun k\u0131sm\u0131n\u0131n alt y\u00fczeyine (<em>forward lower fuselage<\/em>) entegre edilmi\u015ftir.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3.1 <em>Localizer<\/em> ve <em>Glideslope<\/em> Sinyal \u0130\u015fleme Matemati\u011fi<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><em>LOC<\/em><\/strong> (Localizer) anteni, u\u00e7a\u011f\u0131n yatay eksendeki pist merkez hatt\u0131ndan sapmas\u0131n\u0131 \u00f6l\u00e7erken; <strong><em>G\/S<\/em><\/strong> (Glideslope) anteni 3 derecelik ideal dikey s\u00fcz\u00fcl\u00fc\u015f hatt\u0131n\u0131 belirler. Bu sistemler basit bir telsiz gibi \u00e7al\u0131\u015fmaz; <em>Difference in Depth of Modulation<\/em> (DDM) [Mod\u00fclasyon Derinli\u011fi Fark\u0131] ad\u0131 verilen ola\u011fan\u00fcst\u00fc hassas bir fiziksel prensibe dayan\u0131rlar.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Yer istasyonu pist merkez hatt\u0131n\u0131n soluna 90 Hz, sa\u011f\u0131na ise 150 Hz frekans\u0131nda mod\u00fcle edilmi\u015f (AM) iki loba sahip sinyal g\u00f6nderir. U\u00e7a\u011f\u0131n burnundaki <em>Localizer<\/em> anteni bu iki sinyali al\u0131r. E\u011fer u\u00e7ak tam pistin merkezindeyse, antenin ald\u0131\u011f\u0131 90 Hz ve 150 Hz sinyallerinin g\u00fcc\u00fc tam olarak e\u015fittir (<em>DDM<\/em> = 0). U\u00e7ak sola kayarsa 90 Hz bask\u0131n \u00e7\u0131kar, sa\u011fa kayarsa 150 Hz bask\u0131n \u00e7\u0131kar. Otopilot bilgisayar\u0131 (<em>Flight Control Computer<\/em>), bu mikrovolt seviyesindeki genlik fark\u0131n\u0131 okuyarak devasa hidrolik y\u00fczeylere komut verir.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3.2 Sinyal K\u0131r\u0131lmas\u0131 (<em>Refraction<\/em>) ve Otopilot \u0130ll\u00fczyonu<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0130\u015fte bu noktada <em>radome<\/em> fizi\u011fi devreye girer. Antenler <em>radome<\/em> kapa\u011f\u0131n\u0131n arkas\u0131nda durmaktad\u0131r. Kapa\u011f\u0131n damla \u015feklindeki bombeli kompozit yap\u0131s\u0131, elektromanyetik dalgalar i\u00e7in t\u0131pk\u0131 bir merce\u011fin \u0131\u015f\u0131\u011f\u0131 k\u0131rmas\u0131 gibi davranarak optik bir k\u0131r\u0131lma (<em>refraction<\/em>) yarat\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Radome<\/em> kapa\u011f\u0131 orijinal \u00fcretimden \u00e7\u0131kt\u0131\u011f\u0131nda, bu k\u0131r\u0131lma a\u00e7\u0131s\u0131 hesaplanm\u0131\u015f ve otopilot sistemine bir kalibrasyon verisi olarak girilmi\u015ftir. Ancak, k\u0131\u015f \u015fartlar\u0131nda kapa\u011f\u0131n \u00fczerinde asimetrik bir buzlanma olu\u015fursa ya da u\u00e7ak bak\u0131m hangar\u0131na girdi\u011finde teknisyen kapa\u011f\u0131 boyarken havac\u0131l\u0131k standartlar\u0131na uymayan, sadece 1 milimetre daha kal\u0131n bir statik \u00f6nleyici siyah boya (<em>anti-static coating<\/em>) uygularsa fiziksel kurallar alt\u00fcst olur.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Boyan\u0131n veya buzun yaratt\u0131\u011f\u0131 yeni dielektrik bariyeri, sa\u011fdan gelen 150 Hz sinyali ile soldan gelen 90 Hz sinyalini <strong>farkl\u0131 oranlarda<\/strong> s\u00f6n\u00fcmler (<em>unequal attenuation<\/em>). Ayr\u0131ca sinyalin faz\u0131nda gecikme (<em>phase shift<\/em>) yarat\u0131r. U\u00e7a\u011f\u0131n anteni, fiziken tam pistin ortas\u0131nda bulunmas\u0131na ra\u011fmen, bu boya\/buz hatas\u0131 y\u00fcz\u00fcnden 90 Hz sinyalini daha g\u00fc\u00e7l\u00fc okur. Otopilota giden veri &#8220;U\u00e7ak pistin solunda, sa\u011fa d\u00f6n!&#8221; \u015feklindedir. Otopilot bu yalan veriye inan\u0131r ve u\u00e7a\u011f\u0131n burnunu sa\u011fa \u00e7evirir. CAT III s\u0131f\u0131r g\u00f6r\u00fc\u015f \u015fartlar\u0131nda pilotlar\u0131n pisti g\u00f6rme imkan\u0131 yoktur. Sadece 1 milimetrelik boya kal\u0131nl\u0131\u011f\u0131 hatas\u0131, <em>Difference in Depth of Modulation<\/em> (DDM) dengesini bozdu\u011fu i\u00e7in u\u00e7a\u011f\u0131n tekerleklerinin pistin d\u0131\u015f\u0131na, toprak zemine vurmas\u0131yla sonu\u00e7lanan bir felakete yol a\u00e7ar<em><sub>ICAO Doc 8168 PANS-OPS Vol. II.<\/sub><\/em><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3.3 Y\u00fcksek H\u00fccum A\u00e7\u0131s\u0131 (<em>High AoA<\/em>) ve <em>Multipath<\/em> (\u00c7oklu Yol) Etkisi<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B737, ini\u015f konfig\u00fcrasyonunda (flaplar 30 veya 40, ini\u015f tak\u0131mlar\u0131 a\u015fa\u011f\u0131da) aerodinamik olarak burnu yukar\u0131da (<em>nose-up<\/em>), yani y\u00fcksek bir h\u00fccum a\u00e7\u0131s\u0131yla (<em>Angle of Attack<\/em>) yakla\u015fma yapar. Bu pozisyon, u\u00e7a\u011f\u0131n burnunu ve alt\u0131ndaki antenlerin yer istasyonuna olan elektromanyetik g\u00f6r\u00fc\u015f a\u00e7\u0131s\u0131n\u0131 daralt\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Daha da b\u00fcy\u00fck sorun \u015fudur: Yerdeki istasyondan gelen <strong><em>ILS<\/em><\/strong> sinyali sadece do\u011frudan antene \u00e7arpmaz. Sinyalin bir k\u0131sm\u0131 u\u00e7a\u011f\u0131n a\u00e7\u0131k olan devasa ini\u015f tak\u0131m\u0131 kapaklar\u0131na (<em>landing gear doors<\/em>) veya sarkm\u0131\u015f olan flap mekanizmalar\u0131na \u00e7arpar, buralardan yans\u0131r (<em>reflection<\/em>) ve nanosaniyeler sonra burnun alt\u0131ndaki antene ikinci bir sinyal olarak ula\u015f\u0131r. Ayn\u0131 sinyalin antene farkl\u0131 yollardan ve farkl\u0131 fazlarda ula\u015fmas\u0131na <em>multipath<\/em> (\u00e7oklu yol) etkisi denir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">E\u011fer yans\u0131yan bu sinyal do\u011frudan gelen sinyalle z\u0131t fazda (<em>out of phase<\/em>) bulu\u015fursa, iki sinyal birbirini s\u00f6n\u00fcmler (<em>destructive interference<\/em>). Bir anda <em>Glideslope<\/em> ibresi kokpitte dalgalanmaya veya tamamen kaybolmaya ba\u015flar. Bu y\u00fczden B737 sistem m\u00fchendisleri, <em>radome<\/em> i\u00e7erisindeki antenlerin fiziksel yerle\u015fimini milimetrik olarak hesaplarken; u\u00e7a\u011f\u0131n ini\u015f konfig\u00fcrasyonunda kendi g\u00f6vdesinden kaynaklanan bu yans\u0131malar\u0131n yarataca\u011f\u0131 <em>crosstalk<\/em> (\u00e7apraz kar\u0131\u015fma) ya da sinyal iptallerini engellemek i\u00e7in \u00fc\u00e7 boyutlu s\u0131n\u0131r tabaka analizleri yapmak zorundad\u0131r.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3.4 <em>SMS<\/em> (Safety Management System) Kapsam\u0131nda \u00c7evresel Bak\u0131m Toleranslar\u0131<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00fcm bu aerodinamik ve elektromanyetik krizler zinciri, do\u011frudan bak\u0131m hatalar\u0131yla veya \u00e7evresel fark\u0131ndal\u0131k eksikli\u011fiyle tetiklenir. Daha \u00f6nce de belirtildi\u011fi gibi, bir bak\u0131m personelinin kumpas \u00f6l\u00e7\u00fcm\u00fcn\u00fc 13.20 mm yerine yanl\u0131\u015f bir de\u011fer okumas\u0131, sadece mekanik bir hata de\u011fil, u\u00e7a\u011f\u0131n aerodinamik limitlerini ve anten <em>empedans<\/em> de\u011ferlerini \u00e7\u00f6kerten yap\u0131sal bir ihlaldir. <strong><em>ILS<\/em><\/strong> ve <strong><em>WXR<\/em><\/strong> sistemleri gibi u\u00e7u\u015fun en kritik fonksiyonlar\u0131n\u0131 y\u00f6neten antenlerin <em>radome<\/em> i\u00e7i toleranslar\u0131, havac\u0131l\u0131\u011f\u0131n temel ta\u015f\u0131 olan <strong><em>SMS<\/em><\/strong> (Safety Management System) [Emniyet Y\u00f6netim Sistemi] prosed\u00fcrlerinin s\u0131f\u0131r toleransla uygulanmas\u0131n\u0131 mecburi k\u0131lar. Raporlanmayan her bir \u00e7izik, her bir asimetrik boya tabakas\u0131, otopilotun beynine g\u00f6nderilmi\u015f bir vir\u00fcs gibidir.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4.0 G\u00f6vde Alt\u0131 (<em>Bottom Fuselage<\/em>) Navigasyon Sistemleri, Zemin Etkisi (<em>Ground Effect<\/em>) ve Ak\u0131\u015fkanlar Dinami\u011fi<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">U\u00e7a\u011f\u0131n burun k\u0131sm\u0131 (<em>radome<\/em>) serbest hava ak\u0131m\u0131n\u0131 (<em>free stream<\/em>) ilk kar\u015f\u0131layan ve nispeten &#8220;temiz&#8221; bir aerodinamik \u00e7evreye sahip olan b\u00f6lgedir. Ancak Boeing 737&#8217;nin g\u00f6vde alt\u0131 (<em>lower fuselage<\/em> veya <em>belly<\/em>) b\u00f6lgesi, aerodinamik ve kimyasal a\u00e7\u0131dan u\u00e7a\u011f\u0131n en kaotik, en kirli ve en zorlu \u00e7al\u0131\u015fma ortam\u0131d\u0131r. \u0130klimlendirme sistemi (<em>pack<\/em>) egzozlar\u0131, tahliye (<em>drain<\/em>) deliklerinden s\u0131zan hidrolik s\u0131v\u0131lar\u0131, ini\u015f tak\u0131m\u0131 yuvalar\u0131n\u0131n yaratt\u0131\u011f\u0131 devasa t\u00fcrb\u00fclanslar ve pist y\u00fczeyinden seken ta\u015f\/buz par\u00e7alar\u0131 bu b\u00f6lgede yer alan hayati navigasyon antenleri i\u00e7in cehennemvari bir ortam yarat\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Yaz\u0131lar aras\u0131nda ortak d\u00fczen ve de baz\u0131 durumlar\u0131n okuyucu taraf\u0131ndan anla\u015f\u0131labilmesi i\u00e7in Ibosoft standartlar\u0131yla derinle\u015ftirdi\u011fimiz bu b\u00f6l\u00fcmde; u\u00e7a\u011f\u0131n yere olan mutlak mesafesini \u00f6l\u00e7en ve k\u0131sa pist operasyonlar\u0131nda (<em>short field operations<\/em>) aerodinamik modifikasyonlar\u0131n kurban\u0131 olabilen g\u00f6vde alt\u0131 sistemlerinin elektromanyetik fizi\u011fini inceleyece\u011fiz.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4.1 Senaryo: <em>SFP<\/em> (Short Field Performance) Konfig\u00fcrasyonunda Sinyal G\u00f6lgelemesi (<em>Shadowing<\/em>) ve <em>Flare<\/em> Krizi<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Senaryomuzda, B737-800 serisi bir u\u00e7a\u011f\u0131n Trabzon veya Samos gibi k\u0131sa ve fiziki engellerle \u00e7evrili bir piste yakla\u015fma yapt\u0131\u011f\u0131n\u0131 ele alal\u0131m. U\u00e7ak, havayolu \u015firketinin \u00f6zel olarak talep etti\u011fi <strong><em>SFP<\/em><\/strong> (Short Field Performance) [K\u0131sa Pist Performans\u0131] modifikasyon paketine sahiptir. Bu paket, u\u00e7a\u011f\u0131n kalk\u0131\u015f ve ini\u015f performans\u0131n\u0131 art\u0131rmak i\u00e7in kanat <em>slat<\/em> mekanizmalar\u0131nda, <em>spoiler<\/em> a\u00e7\u0131lar\u0131nda ve en \u00f6nemlisi kuyruk k\u0131za\u011f\u0131 (<em>tail skid<\/em>) sisteminde aerodinamik de\u011fi\u015fiklikler i\u00e7erir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><em>SFP<\/em><\/strong> paketine sahip bir B737, ini\u015f s\u0131ras\u0131nda standart bir modele k\u0131yasla daha d\u00fc\u015f\u00fck bir yakla\u015fma h\u0131z\u0131na (<em>V_REF<\/em>) ve dolay\u0131s\u0131yla yakla\u015f\u0131k 2 derece daha y\u00fcksek bir burun yukar\u0131 (<em>nose-up<\/em>) h\u00fccum a\u00e7\u0131s\u0131na (<em>Angle of Attack<\/em>) sahiptir. U\u00e7ak pist e\u015fi\u011fini (<em>runway threshold<\/em>) ge\u00e7erken ve pilot (veya otopilot) s\u00fcz\u00fcl\u00fc\u015f\u00fc k\u0131rmak i\u00e7in <em>flare<\/em> (\u015fahlanma) manevras\u0131na ba\u015flad\u0131\u011f\u0131nda, h\u00fccum a\u00e7\u0131s\u0131 aniden daha da artar.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4.1.1 Geometrik \u0130ll\u00fczyon ve <em>GPWS<\/em> (Ground Proximity Warning System) Gecikmesi<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0130\u015fte tam bu <em>flare<\/em> an\u0131nda, u\u00e7a\u011f\u0131n g\u00f6vde alt\u0131nda yer alan <strong><em>RADALT<\/em><\/strong> (Radar Altimeter) [Radar Altimetresi] antenlerinin yerle olan paralelli\u011fi bozulur. Y\u00fcksek h\u00fccum a\u00e7\u0131s\u0131 nedeniyle, antenin yere do\u011fru yayd\u0131\u011f\u0131 sinyal konisi (<em>beam cone<\/em>) geriye do\u011fru, u\u00e7a\u011f\u0131n sarkm\u0131\u015f olan flaplar\u0131na veya ini\u015f tak\u0131m\u0131 kapaklar\u0131na do\u011fru yatar.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">E\u011fer u\u00e7a\u011f\u0131n aerodinamik konfig\u00fcrasyonu ve anten yerle\u015fimi m\u00fchendislik a\u015famas\u0131nda milimetrik olarak bu y\u00fcksek h\u00fccum a\u00e7\u0131s\u0131na g\u00f6re kalibre edilmemi\u015fse, antenin yayd\u0131\u011f\u0131 sinyalin bir k\u0131sm\u0131 g\u00f6vdeye \u00e7arpar (<em>shadowing<\/em>). Antene geri d\u00f6nen sinyal zay\u0131flar veya tamamen kesilir. U\u00e7ak yerden 30 feet yukar\u0131dayken sistemin kilit k\u0131rmas\u0131 (<em>loss of lock<\/em>), kokpitteki otomatik &#8220;Thirty, Twenty, Ten&#8221; sesli ikazlar\u0131n\u0131n kesilmesine veya <strong><em>GPWS<\/em><\/strong> (Ground Proximity Warning System) [Yere Yakla\u015f\u0131m Uyar\u0131 Sistemi] bilgisayar\u0131n\u0131n u\u00e7a\u011f\u0131n aniden y\u00fckseldi\u011fini zannetmesine yol a\u00e7ar. Bu sinyal ill\u00fczyonu, pilotun <em>flare<\/em> zamanlamas\u0131n\u0131 ka\u00e7\u0131rmas\u0131na ve ini\u015f tak\u0131mlar\u0131n\u0131n yap\u0131sal limitleri zorlayan bir sert ini\u015fle (<em>hard landing<\/em>) piste vurmas\u0131na neden olur<em><sub>Boeing 737 FCOM Vol. 2.<\/sub><\/em><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4.2 <em>RADALT<\/em> (Radar Altimeter) ve <em>FMCW<\/em> (Frekans Mod\u00fclasyonlu S\u00fcrekli Dalga) Matemati\u011fi<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Yukar\u0131daki krizin k\u00f6k nedenini anlamak i\u00e7in <strong><em>RADALT<\/em><\/strong> sisteminin fiziksel \u00e7al\u0131\u015fma prensibini bilmek zorunludur. U\u00e7a\u011f\u0131n deniz seviyesine g\u00f6re de\u011fil, do\u011frudan alt\u0131ndaki fiziksel yery\u00fcz\u00fcne olan mutlak y\u00fcksekli\u011fini (<em>Absolute Altitude<\/em> veya <em>AGL<\/em>) \u00f6l\u00e7en bu sistem, standart bir radar gibi &#8220;sinyal g\u00f6nder, yans\u0131mas\u0131n\u0131 bekle ve s\u00fcreyi \u00f6l\u00e7&#8221; (<em>Pulse<\/em> radar) mant\u0131\u011f\u0131yla \u00e7al\u0131\u015fmaz. Yer \u00e7ok yak\u0131n oldu\u011fu i\u00e7in bu s\u00fcre nanosaniyeler seviyesindedir ve klasik sistemler i\u00e7in \u00f6l\u00e7\u00fclemez.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu nedenle <strong><em>RADALT<\/em><\/strong>, \u00e7ok daha karma\u015f\u0131k bir fiziksel prensip olan <em>FMCW<\/em> (Frequency Modulated Continuous Wave) (Frekans Mod\u00fclasyonlu S\u00fcrekli Dalga) y\u00f6ntemini kullan\u0131r.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4.2.1 Sinyal S\u0131z\u0131nt\u0131s\u0131 (<em>Signal Leakage<\/em>) ve \u0130kiz Anten Mimarisi<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sistem, <code>[-20, 2500]<\/code> feet aral\u0131\u011f\u0131nda 4.2 GHz ile 4.4 GHz frekanslar\u0131 aras\u0131nda (C-Band) s\u00fcrekli de\u011fi\u015fen (s\u00fcp\u00fcr\u00fclen) bir sinyal yayar. G\u00f6nderilen sinyalin frekans\u0131 saniyede defalarca do\u011frusal olarak artar ve azal\u0131r. Sinyal yere \u00e7arp\u0131p geri d\u00f6nd\u00fc\u011f\u00fcnde, u\u00e7aktaki al\u0131c\u0131 anten bu yans\u0131yan sinyali al\u0131r. G\u00f6nderilen anl\u0131k frekans ile al\u0131nan anl\u0131k frekans aras\u0131ndaki fark (<em>beat frequency<\/em> veya vuruntu frekans\u0131), do\u011frudan u\u00e7a\u011f\u0131n y\u00fcksekli\u011fi ile orant\u0131l\u0131d\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu &#8220;s\u00fcrekli&#8221; yay\u0131n nedeniyle, sistem tek bir anten \u00fczerinden hem g\u00f6nderim hem al\u0131m yapamaz. G\u00f6vde alt\u0131nda biri verici (<em>Tx<\/em>), di\u011feri al\u0131c\u0131 (<em>Rx<\/em>) olmak \u00fczere bir \u00e7ift <em>patch<\/em> (yama) tipi anten bulunmas\u0131 zorunludur.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Buradaki en b\u00fcy\u00fck m\u00fchendislik zorlu\u011fu, <em>signal leakage<\/em> (sinyal s\u0131z\u0131nt\u0131s\u0131) sorunudur. E\u011fer verici antenden \u00e7\u0131kan 4 GHz&#8217;lik g\u00fc\u00e7l\u00fc sinyalin k\u00fc\u00e7\u00fck bir k\u0131sm\u0131 bile yere gitmeden do\u011frudan g\u00f6vde \u00fczerinden s\u00fcz\u00fclerek birka\u00e7 santimetre yandaki al\u0131c\u0131 antene girerse, sistem u\u00e7a\u011f\u0131n yerle temas halinde oldu\u011funu, yani y\u00fcksekli\u011fin 0 feet oldu\u011funu zanneder. Bu felaketi \u00f6nlemek i\u00e7in iki anten aras\u0131na, u\u00e7a\u011f\u0131n al\u00fcminyum kaportas\u0131n\u0131n elektromanyetik dalgalar\u0131 emece\u011fi veya yans\u0131taca\u011f\u0131 spesifik bir izole mesafe (genellikle 90 cm ile 120 cm aras\u0131) konulur ve bu antenlerin u\u00e7a\u011f\u0131n simetri ekseninden sapmadan, ayn\u0131 yatay d\u00fczleme monte edilmesi mecburi k\u0131l\u0131n\u0131r.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4.3 G\u00f6vde Alt\u0131 Ak\u0131\u015fkanlar Dinami\u011fi ve \u00c7evresel Korozyon (Kimyasal Tehdit)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bir u\u00e7a\u011f\u0131n \u00fcst k\u0131sm\u0131ndaki antenler sadece ya\u011fmur veya buz ile m\u00fccadele ederken, g\u00f6vde alt\u0131ndaki antenler yer\u00e7ekiminin kurban\u0131 olarak u\u00e7aktaki t\u00fcm kimyasal s\u0131v\u0131lar\u0131n topland\u0131\u011f\u0131 tahliye hatt\u0131 \u00fczerindedir.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4.3.1 <em>Skydrol<\/em> Erozyonu ve <em>Empedans<\/em> De\u011fi\u015fimi<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Boeing 737&#8217;nin hidrolik sistemlerinde kullan\u0131lan <em>Skydrol<\/em> (fosfat ester bazl\u0131 yang\u0131na dayan\u0131kl\u0131 hidrolik s\u0131v\u0131), havac\u0131l\u0131ktaki en agresif ve a\u015f\u0131nd\u0131r\u0131c\u0131 kimyasallardan biridir. Bir boyay\u0131 veya standart bir plasti\u011fi saatler i\u00e7inde eritip yok edebilir. U\u00e7u\u015f s\u0131ras\u0131nda veya yerde, ini\u015f tak\u0131m\u0131 yuvalar\u0131ndan veya hidrolik pompalardan s\u0131zan mikro miktardaki <em>Skydrol<\/em>, g\u00f6vdenin alt y\u00fczeyi boyunca geriye do\u011fru akar.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu kimyasal s\u0131v\u0131, tam da <strong><em>RADALT<\/em><\/strong> veya <strong><em>DME<\/em><\/strong> (Distance Measuring Equipment) [Mesafe \u00d6l\u00e7\u00fcm Cihaz\u0131] antenlerinin g\u00f6vdeye ba\u011fland\u0131\u011f\u0131 taban plakas\u0131na ula\u015f\u0131r. Antenleri korozyondan korumak i\u00e7in uygulanan <em>polysulfide sealant<\/em> (polis\u00fclfit s\u0131zd\u0131rmazl\u0131k bile\u015fi\u011fi), zamanla termal d\u00f6ng\u00fcler (yerde +40 \u00b0C, havada -50 \u00b0C) nedeniyle mikro d\u00fczeyde \u00e7atlar. <em>Skydrol<\/em> bu \u00e7atlaklardan antenin taban\u0131na s\u0131zd\u0131\u011f\u0131nda, antenin d\u0131\u015f z\u0131rh\u0131n\u0131 g\u00f6vdeye ba\u011flayan topraklama (<em>bonding<\/em>) y\u00fczeyini kimyasal olarak okside eder.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Topraklama direncinin birka\u00e7 miliohm artmas\u0131, 4 GHz gibi muazzam y\u00fcksek bir frekansta \u00e7al\u0131\u015fan antenin <em>empedans<\/em> (impedance) dengesini an\u0131nda bozar. Anten, t\u0131pk\u0131 1. b\u00f6l\u00fcmde anlatt\u0131\u011f\u0131m\u0131z buzlanma\/rezonans senaryosunda oldu\u011fu gibi, sistemin g\u00f6nderdi\u011fi g\u00fcc\u00fc yans\u0131tmaya (<em>VSWR<\/em> art\u0131\u015f\u0131) ba\u015flar. Sonu\u00e7 olarak kimyasal bir s\u0131z\u0131nt\u0131, do\u011frudan bir elektronik \u00e7\u00f6k\u00fc\u015fe ve CAT III yakla\u015fma kabiliyetinin yitirilmesine neden olur<em><sub>Boeing 737 AMM 34-30-00.<\/sub><\/em><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4.4 <em>DME<\/em> (Distance Measuring Equipment) ve <em>Pulse Pair<\/em> (Darbe \u00c7ifti) Kodlamas\u0131<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">G\u00f6vde alt\u0131ndaki bir di\u011fer kritik sistem olan <strong><em>DME<\/em><\/strong>, u\u00e7a\u011f\u0131n yer istasyonuna olan fiziksel uzakl\u0131\u011f\u0131n\u0131 hesaplar. Ancak bu uzakl\u0131k, harita \u00fczerindeki ku\u015f u\u00e7u\u015fu yatay mesafe de\u011fil, hipoten\u00fcs \u00fczerinden hesaplanan <em>slant range<\/em> (e\u011fik mesafe) de\u011feridir.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4.4.1 Sorgulay\u0131c\u0131 (<em>Interrogator<\/em>) ve Yan\u0131tlay\u0131c\u0131 (<em>Transponder<\/em>) Dinamikleri<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L-Band (962-1213 MHz) UHF frekans aral\u0131\u011f\u0131nda \u00e7al\u0131\u015fan <strong><em>DME<\/em><\/strong> anteni, yere do\u011fru rastgele aral\u0131klarla ancak spesifik bir d\u00fczende &#8220;Darbe \u00c7iftleri&#8221; (<em>Pulse Pairs<\/em>) g\u00f6nderir (<em>interrogation<\/em>). Yer istasyonu bu \u00f6zel kodlanm\u0131\u015f \u00e7ifti al\u0131r, tam 50 mikrosaniye (sistemin standart gecikme s\u00fcresi) bekler ve u\u00e7a\u011fa farkl\u0131 bir frekansta geri g\u00f6nderir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">U\u00e7aktaki bilgisayar, sinyalin gidi\u015f-d\u00f6n\u00fc\u015f s\u00fcresinden 50 mikrosaniyeyi \u00e7\u0131kar\u0131r, kalan s\u00fcreyi \u0131\u015f\u0131k h\u0131z\u0131na b\u00f6lerek mesafeyi deniz mili (NM &#8211; Nautical Mile) cinsinden kokpite yans\u0131t\u0131r.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4.4.2 S\u0131n\u0131r Tabaka (<em>Boundary Layer<\/em>) Kirlili\u011fi ve Geometrik K\u00f6rl\u00fck<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">U\u00e7a\u011f\u0131n g\u00f6vde alt\u0131 profili, burun ini\u015f tak\u0131m\u0131 kapaklar\u0131 (<em>nose gear doors<\/em>) ve \u00e7e\u015fitli hava giri\u015f\/\u00e7\u0131k\u0131\u015f (<em>ram air doors<\/em>) kapak\u00e7\u0131klar\u0131yla doludur. U\u00e7ak y\u00fcksek h\u0131zlarda seyrederken, bu kapak\u00e7\u0131klar\u0131n etraf\u0131nda \u015fiddetli bir t\u00fcrb\u00fclans, yani s\u0131n\u0131r tabaka kirlili\u011fi (<em>boundary layer separation<\/em>) olu\u015fur.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ses h\u0131z\u0131na yakla\u015fan (<em>transonic<\/em>) bu t\u00fcrb\u00fclansl\u0131 hava ak\u0131m\u0131, havan\u0131n yo\u011funlu\u011funu (<em>density<\/em>) milisaniyeler i\u00e7inde de\u011fi\u015ftirir. Elektromanyetik dalgalar\u0131n ilerleme h\u0131z\u0131, i\u00e7inden ge\u00e7tikleri ortam\u0131n yo\u011funlu\u011funa ba\u011fl\u0131d\u0131r. E\u011fer <strong><em>DME<\/em><\/strong> anteni, aerodinamik olarak kirli bir ak\u0131\u015f\u0131n hemen arkas\u0131na (\u00f6rne\u011fin bir egzoz \u00e7\u0131k\u0131\u015f\u0131n\u0131n veya <em>ram air<\/em> kapa\u011f\u0131n\u0131n yak\u0131n\u0131na) yerle\u015ftirilirse; t\u00fcrb\u00fclansl\u0131 havan\u0131n yaratt\u0131\u011f\u0131 mikroskobik yo\u011funluk farklar\u0131, L-Band radyo frekans\u0131nda saniyelik k\u0131r\u0131lmalara (<em>refraction<\/em>) yol a\u00e7ar. Bu durum sistemin mesafeyi anl\u0131k olarak yanl\u0131\u015f hesaplamas\u0131na, dolay\u0131s\u0131yla <em>FMC<\/em> (Flight Management Computer) [U\u00e7u\u015f Y\u00f6netim Bilgisayar\u0131] \u00fczerinde pozisyon kaymalar\u0131na (<em>map shift<\/em>) sebebiyet verir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu y\u00fczden u\u00e7ak tasar\u0131mc\u0131lar\u0131, <strong><em>DME<\/em><\/strong> antenlerini burun ini\u015f tak\u0131m\u0131n\u0131n yaratt\u0131\u011f\u0131 t\u00fcrb\u00fclans koridorundan (<em>wake<\/em>) uza\u011fa, ak\u0131\u015f\u0131n yeniden <em>laminar<\/em> (d\u00fczenli) hale geldi\u011fi \u00e7ok spesifik g\u00f6vde alt\u0131 d\u00fczl\u00fcklerine yerle\u015ftirmek zorundad\u0131r<em><sub>FAA-H-8083-31A Vol. 2.<\/sub><\/em><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>5.0 Kuyruk (<em>Empennage<\/em>) Geometrisi, Navigasyon Fizi\u011fi ve Uzun Menzil (<em>Long Range<\/em>) Haberle\u015fme<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">U\u00e7a\u011f\u0131n \u00f6n ve alt k\u0131s\u0131mlar\u0131ndan geriye, kuyruk tak\u0131m\u0131na (<em>empennage<\/em>) do\u011fru ilerledi\u011fimizde, aerodinamik ak\u0131\u015f\u0131n en kaotikle\u015fti\u011fi (<em>wake turbulence<\/em>) ancak fiziksel olarak yerden en y\u00fcksekte olan b\u00f6lgeye ula\u015f\u0131r\u0131z. Bu tepe noktas\u0131, ufuk hatt\u0131 (<em>line of sight<\/em>) ile \u00e7al\u0131\u015fan seyr\u00fcsefer sistemleri ve u\u00e7a\u011f\u0131n s\u0131n\u0131rlar\u0131n\u0131n \u00f6tesine (<em>beyond line of sight<\/em>) ge\u00e7mesi gereken uzun menzil haberle\u015fme sistemleri i\u00e7in stratejik bir konumdur.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Yaz\u0131lar aras\u0131nda ortak d\u00fczen ve de baz\u0131 durumlar\u0131n okuyucu taraf\u0131ndan anla\u015f\u0131labilmesi i\u00e7in Ibosoft vizyonuyla kaleme al\u0131nan bu b\u00f6l\u00fcmde; B737 u\u00e7a\u011f\u0131n\u0131n dikey stabilizat\u00f6r\u00fcn\u00fcn (<em>vertical stabilizer<\/em>) sadece y\u00f6nsel kararl\u0131l\u0131k (<em>directional stability<\/em>) sa\u011flayan bir kontrol y\u00fczeyi de\u011fil, ayn\u0131 zamanda devasa bir radyo anteni olarak nas\u0131l kullan\u0131ld\u0131\u011f\u0131n\u0131 ve <strong><em>VOR<\/em><\/strong> sinyallerinin bu kuyruk b\u00f6lgesinde yaratt\u0131\u011f\u0131 elektromanyetik zorluklar\u0131 inceleyece\u011fiz.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>5.1 <em>VOR<\/em> (VHF Omnidirectional Range) [VHF \u00c7ok Y\u00f6nl\u00fc Radyo Frekans\u0131] ve Kuyruk Entegrasyonu<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><em>VOR<\/em><\/strong> sistemi, u\u00e7a\u011f\u0131n yerdeki bir referans istasyonuna g\u00f6re hangi radyalde (<em>radial<\/em>) u\u00e7tu\u011funu belirleyen, havac\u0131l\u0131\u011f\u0131n en temel seyr\u00fcsefer yard\u0131mc\u0131s\u0131d\u0131r. 108.00 ile 117.95 MHz aras\u0131ndaki <em>VHF<\/em> (Very High Frequency) [\u00c7ok Y\u00fcksek Frekans] band\u0131nda \u00e7al\u0131\u015f\u0131r.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>5.1.1 Aerodinamik <em>Towel Bar<\/em> (Havlu Ask\u0131s\u0131) ve <em>Flush Mounted<\/em> (G\u00f6mme) Tasar\u0131mlar<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Geleneksel olarak, \u00f6zellikle B737&#8217;nin eski modellerinde (Classic ve baz\u0131 NG&#8217;lerde), <strong><em>VOR<\/em><\/strong> antenleri dikey stabilizat\u00f6r\u00fcn sa\u011f ve sol \u00fcst y\u00fczeylerine simetrik olarak yerle\u015ftirilmi\u015f, &#8220;havlu ask\u0131s\u0131&#8221; (<em>towel bar<\/em>) veya bumerang \u015feklinde \u00e7\u0131k\u0131nt\u0131l\u0131 \u00e7ubuklardan olu\u015furdu. Bu antenler, u\u00e7a\u011f\u0131n sa\u011f\u0131ndan ve solundan gelen istasyon sinyallerini, g\u00f6vdenin <em>shadowing<\/em> (g\u00f6lgeleme) etkisine maruz kalmadan alabilmek i\u00e7in bu tepe noktas\u0131na konumland\u0131r\u0131lm\u0131\u015ft\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ancak, saatte 800 km h\u0131zla u\u00e7an bir jet yolcu u\u00e7a\u011f\u0131nda, kuyru\u011fun en tepe noktas\u0131ndaki en ufak bir \u00e7\u0131k\u0131nt\u0131 bile ciddi bir <em>parasite drag<\/em> (parazit s\u00fcr\u00fckleme) yarat\u0131r ve <em>boundary layer<\/em> (s\u0131n\u0131r tabaka) i\u00e7erisindeki hava ak\u0131\u015f\u0131n\u0131 bozarak d\u00fcmenin (<em>rudder<\/em>) etkinli\u011fini mikro seviyede de olsa etkiler. Bu nedenle modern B737 modellerinde ve <em>PIP<\/em> (Performance Improvement Package) iyile\u015ftirmelerinde, bu \u00e7\u0131k\u0131nt\u0131l\u0131 \u00e7ubuklar kald\u0131r\u0131larak yerine dikey stabilizat\u00f6r\u00fcn y\u00fczeyiyle tamamen ayn\u0131 hizada olan <em>flush mounted<\/em> (y\u00fczeye s\u0131f\u0131r\/g\u00f6mme) kompozit antenler entegre edilmi\u015ftir. Bu kompozit pencerelerin y\u00fczeylerindeki en ufak bir \u00e7izik veya korozyon, antenin <em>empedans<\/em> de\u011ferini bozarak kokpitteki radyal bilgisinin kaymas\u0131na neden olabilir.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>5.1.2 <em>Diplexer<\/em> (Sinyal Ay\u0131r\u0131c\u0131) ve Faz \u00c7at\u0131\u015fmas\u0131 (<em>Phase Conflict<\/em>)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>VOR <\/strong>anteni, sadece y\u00f6n bulmak i\u00e7in de\u011fil, ayn\u0131 zamanda yakla\u015fma s\u0131ras\u0131nda LOC (<em>Localizer<\/em>) sinyallerini almak i\u00e7in de kullan\u0131l\u0131r (\u00e7\u00fcnk\u00fc her iki sistem de benzer frekans band\u0131n\u0131 payla\u015f\u0131r). Ancak B737&#8217;de antenden al\u0131nan bu sinyal do\u011frudan \u00fc\u00e7 farkl\u0131 cihaza g\u00f6nderilmez; bir G\u00fc\u00e7 B\u00f6l\u00fcc\u00fc (<em>Splitter<\/em>) ile Kaptan (MMR 1) ve \u0130kinci Pilot (MMR 2) al\u0131c\u0131lar\u0131na da\u011f\u0131t\u0131l\u0131r. Standby enstr\u00fcman ise bu veriyi do\u011frudan antenden de\u011fil, Kaptan\u0131n bilgisayar\u0131ndan al\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">E\u011fer al\u0131nan radyo sinyali basit bir kabloyla \u00fc\u00e7e b\u00f6l\u00fcn\u00fcrse, elektromanyetik dalgalar kablo birle\u015fim noktalar\u0131nda birbirine \u00e7arpar, yans\u0131r ve sinyalin g\u00fcc\u00fc (<em>amplitude<\/em>) ile faz\u0131 (<em>phase<\/em>) bozulur. Bunu \u00f6nlemek i\u00e7in antenin hemen alt\u0131nda, kuyruk yap\u0131s\u0131n\u0131n i\u00e7inde <em>diplexer<\/em> veya <em>power splitter<\/em> (g\u00fc\u00e7 b\u00f6l\u00fcc\u00fc\/sinyal ay\u0131r\u0131c\u0131) ad\u0131 verilen pasif mikrodalga filtreleri kullan\u0131l\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bir bak\u0131m teknisyeninin bu <em>diplexer<\/em> ba\u011flant\u0131lar\u0131nda kulland\u0131\u011f\u0131 koaksiyel kablolar\u0131n uzunluklar\u0131 (<em>cable length matching<\/em>) tesad\u00fcfi de\u011fildir; milimetrik olarak e\u015fle\u015fmek zorundad\u0131r. E\u011fer kablolardan biri di\u011ferinden birka\u00e7 santimetre daha k\u0131sa kesilirse, sinyal o kablodan mikrosaniyeler daha erken ge\u00e7er ve Kaptan&#8217;\u0131n HSI (<em>Horizontal Situation Indicator<\/em>) ekran\u0131 pisti tam kar\u015f\u0131s\u0131nda g\u00f6sterirken, \u0130kinci Pilot&#8217;un ekran\u0131 u\u00e7a\u011f\u0131n 2 derece sa\u011fda oldu\u011funu g\u00f6sterir. U\u00e7u\u015f ekibi bu \u00e7eli\u015fkiyi g\u00f6rd\u00fc\u011f\u00fcnde pas ge\u00e7mek (<em>go-around<\/em>) zorunda kal\u0131r. Yani kuyruktaki bir kablonun santimetrelik boy fark\u0131, do\u011frudan u\u00e7u\u015f operasyonunu iptal ettiren kritik bir bak\u0131m emniyeti ihlaline d\u00f6n\u00fc\u015f\u00fcr<em><sub>Boeing 737 WDM 34-31-11.<\/sub><\/em><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>5.2 <em>HF<\/em> (High Frequency) [Y\u00fcksek Frekans] Anteni: Kuyruk Ba\u011flant\u0131s\u0131 (<em>Shunt<\/em> Beslemesi)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bir B737, \u00f6rne\u011fin Atlantik Okyanusu&#8217;nu ge\u00e7erken veya Sibirya \u00fczerinden u\u00e7arken, karadaki <strong><em>VHF<\/em><\/strong> istasyonlar\u0131n\u0131n menzilinden \u00e7\u0131kar. D\u00fcnya yuvarlak oldu\u011fu i\u00e7in &#8220;ufuk hatt\u0131&#8221; prensibiyle \u00e7al\u0131\u015fan hi\u00e7bir sinyal okyanusun \u00f6tesine ula\u015famaz. Bu noktada u\u00e7a\u011f\u0131n d\u00fcnya ile tek ba\u011flant\u0131s\u0131, 2 ile 30 MHz aras\u0131nda \u00e7al\u0131\u015fan ve sinyallerini \u0130yonosfer&#8217;den (<em>Ionosphere<\/em>) yans\u0131tarak d\u00fcnyan\u0131n \u00f6b\u00fcr ucuna ula\u015ft\u0131ran <strong><em>HF<\/em><\/strong> (High Frequency) [Y\u00fcksek Frekans] telsizidir.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>5.2.1 Dalga Boyu Geometrisi ve Yap\u0131sal Entegrasyon<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Frekans ile dalga boyu aras\u0131ndaki lambda = c\/<strong>f<\/strong> ili\u015fkisini hat\u0131rlayal\u0131m. <strong><em>HF<\/em><\/strong> frekanslar\u0131 \u00e7ok d\u00fc\u015f\u00fck oldu\u011fu i\u00e7in, radyo dalgalar\u0131n\u0131n boyu 10 metreden 150 metreye kadar uzan\u0131r. Verimli bir radyo yay\u0131n\u0131 yapabilmek i\u00e7in, antenin uzunlu\u011funun g\u00f6nderilen dalga boyunun en az d\u00f6rtte biri (lambda\/4) olmas\u0131 gerekir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B737&#8217;nin \u00fczerine 10 metre uzunlu\u011funda metal bir \u00e7ubuk (anten) dikmek aerodinamik olarak imkans\u0131zd\u0131r. Eski pervaneli veya ilk nesil jet u\u00e7aklar\u0131nda, kokpitten kuyru\u011fa do\u011fru gerilmi\u015f \u00e7elik teller (<em>wire antennas<\/em>) kullan\u0131l\u0131rd\u0131. Ancak bu teller y\u00fcksek h\u0131zlarda <em>flutter<\/em> (\u00e7\u0131rp\u0131nma) nedeniyle kopar ve u\u00e7a\u011fa zarar verirdi.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Modern u\u00e7ak \u00fcreticileri bu sorunu \u00e7\u00f6zmek i\u00e7in d\u00e2hice bir m\u00fchendislik hamlesi yapm\u0131\u015ft\u0131r: Anten takmak yerine, u\u00e7a\u011f\u0131n mevcut yap\u0131s\u0131n\u0131 antene d\u00f6n\u00fc\u015ft\u00fcrm\u00fc\u015flerdir. B737&#8217;nin dikey stabilizat\u00f6r\u00fcn\u00fcn h\u00fccum kenar\u0131 (<em>leading edge<\/em>), fiberglas bir kapakla yap\u0131sal ana g\u00f6vdeden elektriksel olarak izole edilir. \u0130\u00e7erideki devasa al\u00fcminyum par\u00e7a (<em>shunt feed<\/em>), u\u00e7a\u011f\u0131n metal g\u00f6vdesini &#8220;toprak&#8221; (<em>ground<\/em>) kabul ederek t\u00fcm dikey stabilizat\u00f6r\u00fc devasa bir radyo anteni (<em>notch antenna<\/em> veya <em>shunt antenna<\/em>) olarak kullan\u0131r.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>5.2.2 <em>Antenna Coupler<\/em> (Anten Ba\u011fla\u015ft\u0131r\u0131c\u0131) ve Y\u00fcksek Gerilim Krizi<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Radyo dalgas\u0131 de\u011fi\u015firken, bu devasa al\u00fcminyum par\u00e7an\u0131n elektriksel uzunlu\u011funun da de\u011fi\u015fmesi gerekir. Bunu fiziksel olarak yapmak imkans\u0131z oldu\u011fu i\u00e7in, kuyru\u011fun hemen i\u00e7ine <em>Antenna Coupler<\/em> (Anten Ba\u011fla\u015ft\u0131r\u0131c\u0131) ad\u0131 verilen ak\u0131ll\u0131 bir bilgisayar yerle\u015ftirilir. Bu cihaz, pilot telsiz frekans\u0131n\u0131 her de\u011fi\u015ftirdi\u011finde, saniyeler i\u00e7inde binlerce voltluk kondansat\u00f6rleri ve bobinleri devreye sokarak antenin elektriksel uzunlu\u011funu o frekansa uygun hale getirir (Tuning \/ Ayarlama s\u00fcreci).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>NOT:<\/strong> Bu i\u015flem s\u0131ras\u0131nda, <strong><em>HF<\/em><\/strong> telsizi havaya 400 Watt civar\u0131nda devasa bir radyo frekans g\u00fcc\u00fc basar. Bu g\u00fc\u00e7, dikey stabilizat\u00f6r\u00fcn d\u0131\u015f y\u00fczeyinde binlerce voltluk, g\u00f6r\u00fcnmez ancak \u00f6l\u00fcmc\u00fcl bir elektromanyetik alan yarat\u0131r. E\u011fer u\u00e7ak hangardayken veya yerdeki bir A-Check bak\u0131m\u0131 s\u0131ras\u0131nda teknisyen kuyruk b\u00f6lgesinde (\u00f6rne\u011fin APU egzozunda veya d\u00fcmende) \u00e7al\u0131\u015f\u0131yorsa ve kokpitteki bir ba\u015fka teknisyen veya pilot yanl\u0131\u015fl\u0131kla <strong><em>HF<\/em><\/strong> telsizinin mandal\u0131na (PTT) basarsa, kuyruktaki personel ciddi radyo frekans yan\u0131klar\u0131na (<em>RF burns<\/em>) maruz kalabilir veya kalp krizi ge\u00e7irebilir. Bu nedenle, u\u00e7ak yerdeyken <strong><em>HF<\/em><\/strong> telsizinin etraf\u0131ndaki sigortalar\u0131n (<em>circuit breakers<\/em>) \u00e7ekilmesi ve &#8220;\u00c7ALI\u015eTIRMAYIN&#8221; (<em>DO NOT OPERATE<\/em>) etiketlerinin as\u0131lmas\u0131, sadece bir kural de\u011fil, hayat kurtaran mutlak bir bak\u0131m zorunlulu\u011fudur<em><sub>FAA-H-8083-30B<\/sub><\/em>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>5.3 Kuyruk B\u00f6lgesindeki Akustik ve Termal Yorulma (<em>Acoustic Fatigue<\/em>)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kuyruk b\u00f6lgesi sadece aerodinamik t\u00fcrb\u00fclansa de\u011fil, ayn\u0131 zamanda u\u00e7a\u011f\u0131n en s\u0131cak ve en g\u00fcr\u00fclt\u00fcl\u00fc eleman\u0131 olan <em>APU<\/em> (Auxiliary Power Unit) [Yard\u0131mc\u0131 G\u00fc\u00e7 \u00dcnitesi] egzozuna ev sahipli\u011fi yapar. Kuyru\u011fun ucuna yerle\u015ftirilen arka <strong><em>VOR<\/em><\/strong> veya di\u011fer navigasyon antenlerinin d\u0131\u015f y\u00fczeyleri, her u\u00e7u\u015fta APU&#8217;nun yaratt\u0131\u011f\u0131 y\u00fcksek frekansl\u0131 akustik titre\u015fimlere (<em>acoustic fatigue<\/em>) ve y\u00fczlerce derecelik termal \u015foklara maruz kal\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu akustik bombard\u0131man, anteni g\u00f6vdeye ba\u011flayan vidalardaki <em>lockwire<\/em> (emniyet teli) gerginli\u011fini zamanla gev\u015fetebilir veya kompozit y\u00fczeyde mikroskobik <em>delamination<\/em> (katman ayr\u0131\u015fmas\u0131) ba\u015flatabilir. U\u00e7u\u015f operasyon ekiplerinin, u\u00e7a\u011f\u0131n \u00e7evresel limitlerini sadece d\u0131\u015f hava s\u0131cakl\u0131\u011f\u0131 (OAT) ile de\u011fil, bu t\u00fcr yap\u0131sal sistemlerin kendi yaratt\u0131klar\u0131 i\u00e7 termodinamik ve akustik \u00e7evrelere g\u00f6re de de\u011ferlendirmesi gerekir.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>6.0 Uzay Segmenti, <em>SATCOM<\/em> Aerodinami\u011fi ve Faz Merkezi (<em>Phase Center<\/em>) Fizi\u011fi<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">U\u00e7a\u011f\u0131n kuyruk b\u00f6lgesindeki (<em>empennage<\/em>) devasa <strong><em>HF<\/em><\/strong> elektromanyetik alanlar\u0131ndan \u00e7\u0131k\u0131p g\u00f6vdenin en \u00fcst s\u0131rt \u00e7izgisine (<em>crown area<\/em>) ilerledi\u011fimizde, modern sivil havac\u0131l\u0131\u011f\u0131n en b\u00fcy\u00fck ticari ve operasyonel devrimlerinden biriyle kar\u015f\u0131la\u015f\u0131r\u0131z: Uzay tabanl\u0131 navigasyon ve geni\u015f bant uydu haberle\u015fmesi. Yaz\u0131lar aras\u0131nda ortak d\u00fczen ve de baz\u0131 durumlar\u0131n okuyucu taraf\u0131ndan anla\u015f\u0131labilmesi i\u00e7in Ibosoft standartlar\u0131yla derinle\u015ftirdi\u011fimiz bu b\u00f6l\u00fcmde; havayolu \u015firketlerinin u\u00e7ak i\u00e7i internet (Wi-Fi) taleplerinin u\u00e7a\u011f\u0131n aerodinamik karakteristi\u011fine vurdu\u011fu \u00f6l\u00fcmc\u00fcl darbeleri ve uydulardan gelen nanosaniyelik sinyallerin g\u00f6vde \u00fczerindeki fiziksel k\u0131r\u0131l\u0131mlar\u0131n\u0131 inceleyece\u011fiz.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>6.1 Tart\u0131\u015fma Ba\u015fl\u0131\u011f\u0131: U\u00e7ak \u0130\u00e7i \u0130nternetin Aerodinamik Bedeli ve Kriz Senaryosu<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>6.1.1 Senaryo: Geometri De\u011fi\u015fimi ve <em>Range<\/em> (Menzil) Kayb\u0131<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bir havayolu \u015firketinin, filosundaki t\u00fcm B737 u\u00e7aklar\u0131na yolcu interneti sa\u011flamak amac\u0131yla Ku-Band veya Ka-Band <strong><em>SATCOM<\/em><\/strong> (Satellite Communications) [Uydu Haberle\u015fmesi] sistemi entegre etme karar\u0131 ald\u0131\u011f\u0131n\u0131 d\u00fc\u015f\u00fcnelim. U\u00e7a\u011f\u0131n g\u00f6vde \u00fcst\u00fcne, genellikle kanat k\u00f6k\u00fcn\u00fcn (<em>wing root<\/em>) hemen arkas\u0131na denk gelen tepe noktas\u0131na devasa bir <em>radome<\/em> (radar kapa\u011f\u0131) yerle\u015ftirilir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Havayolu y\u00f6netimi bu durumu sadece kabin i\u00e7i bir &#8220;m\u00fc\u015fteri memnuniyeti&#8221; donan\u0131m\u0131 olarak g\u00f6rebilir. Ancak u\u00e7ak m\u00fchendisleri ve performans departman\u0131 (<em>Flight Ops Engineering<\/em>) i\u00e7in o kapak, u\u00e7a\u011f\u0131n s\u0131rt\u0131nda aniden beliren bir aerodinamik duvard\u0131r. U\u00e7ak Mach 0.78 ile seyrederken, bu yeni <em>SATCOM<\/em> kapa\u011f\u0131 u\u00e7a\u011f\u0131n \u00fczerinde devasa bir form s\u00fcr\u00fcklemesi (<em>form drag<\/em>) ve arkas\u0131nda bir t\u00fcrb\u00fclans koridoru (<em>wake turbulence<\/em>) yarat\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu parazit s\u00fcr\u00fckleme (<em>parasite drag<\/em>), u\u00e7a\u011f\u0131n <em>Total Specific Fuel Consumption<\/em> (TSFC) [Toplam \u00d6zg\u00fcl Yak\u0131t T\u00fcketimi] de\u011ferini an\u0131nda %1.5 ile %2 aras\u0131nda art\u0131r\u0131r. U\u00e7a\u011f\u0131n maksimum menzili (<em>maximum range<\/em>) y\u00fczlerce deniz mili k\u0131sal\u0131r. Acil bir motor kayb\u0131 senaryosunda (<em>engine out drift-down<\/em>) u\u00e7a\u011f\u0131n tutunabilece\u011fi tek motorlu servis tavan\u0131 (<em>single engine service ceiling<\/em>) y\u00fczlerce feet a\u015fa\u011f\u0131 d\u00fc\u015fer.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>6.2 S\u0131n\u0131r Tabaka (<em>Boundary Layer<\/em>) ve Mach Say\u0131s\u0131 (<em>Mach Number<\/em>) Fizi\u011fi<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><em>SATCOM<\/em><\/strong> antenleri, u\u00e7a\u011f\u0131n burnundan geriye do\u011fru akan havay\u0131 b\u00f6len kocaman bir t\u00fcmsektir. Havan\u0131n u\u00e7a\u011f\u0131n \u00fczerinden ak\u0131\u015f h\u0131z\u0131, u\u00e7a\u011f\u0131n kendi h\u0131z\u0131ndan daha y\u00fcksektir. U\u00e7ak Mach 0.78 h\u0131z\u0131nda u\u00e7arken, <em>SATCOM<\/em> kapa\u011f\u0131n\u0131n bombeli yap\u0131s\u0131 \u00fczerinden t\u0131rmanmak zorunda kalan hava molek\u00fclleri, Bernoulli prensibi gere\u011fi inan\u0131lmaz bir h\u0131zlanma ya\u015far.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu yerel h\u0131zlanma, kapa\u011f\u0131n tam tepesinde havan\u0131n ses h\u0131z\u0131n\u0131 a\u015fmas\u0131na (<em>supersonic flow<\/em>) ve Mach 1.0 baraj\u0131n\u0131 k\u0131rmas\u0131na neden olabilir. Ses h\u0131z\u0131n\u0131n a\u015f\u0131ld\u0131\u011f\u0131 bu noktada bir \u015fok dalgas\u0131 (<em>shock wave<\/em>) olu\u015fur. \u015eok dalgas\u0131n\u0131n hemen arkas\u0131nda ise hava ak\u0131\u015f\u0131 g\u00f6vdeden vah\u015fice kopar (<em>flow separation<\/em>). Bu aerodinamik kopma, u\u00e7a\u011f\u0131n dikey stabilizat\u00f6r\u00fcne (<em>vertical stabilizer<\/em>) do\u011frudan t\u00fcrb\u00fclansl\u0131 hava olarak \u00e7arparak d\u00fcmen (<em>rudder<\/em>) etkinli\u011fini azalt\u0131r ve u\u00e7a\u011f\u0131n kuyru\u011funda s\u00fcrekli bir akustik yorulma (<em>acoustic fatigue<\/em>) ba\u015flat\u0131r<em><sub>FAA AC 20-140.<\/sub><\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu krizi \u00f6nlemek i\u00e7in <em>SATCOM<\/em> <em>radome<\/em> tasar\u0131mlar\u0131, aerodinamik damla (<em>teardrop<\/em>) \u015feklinde \u00fcretilmeli ve g\u00f6vdeye ba\u011fland\u0131\u011f\u0131 etek (<em>fairing<\/em>) k\u0131s\u0131mlar\u0131, s\u0131n\u0131r tabakay\u0131 koparmayacak \u00f6zel bir matematikle kaportaya yedirilmelidir.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>6.3 <em>GPS<\/em> (Global Positioning System) [K\u00fcresel Konumland\u0131rma Sistemi] ve Faz Merkezi Kaymas\u0131<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">G\u00f6vde \u00fcst\u00fcndeki devasa uydu kapa\u011f\u0131n\u0131n hemen \u00f6n\u00fcnde, u\u00e7a\u011f\u0131n en k\u00fc\u00e7\u00fck ama u\u00e7u\u015f y\u00f6r\u00fcngesini en keskin belirleyen donan\u0131m\u0131 olan <strong><em>GPS<\/em><\/strong> antenleri bulunur. Genellikle <em>low-profile<\/em> (d\u00fc\u015f\u00fck profilli) olan bu antenler, uzaydaki <em>GNSS<\/em> (Global Navigation Satellite System) uydular\u0131ndan L1 (1575.42 MHz) ve L2 (1227.60 MHz) frekanslar\u0131nda sinyal al\u0131r.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>6.3.1 Zaman Fizi\u011fi ve Elektromanyetik \u0130ll\u00fczyon<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><em>GPS<\/em><\/strong>, asl\u0131nda bir yer bulma sistemi de\u011fil, kusursuz bir zaman \u00f6l\u00e7\u00fcm sistemidir. Sistem, uydudan \u00e7\u0131kan sinyalin antene ula\u015fma s\u00fcresini hesaplar. Elektromanyetik dalgalar \u0131\u015f\u0131k h\u0131z\u0131nda (c = 3 times 10<sup>8<\/sup>m\/s) yay\u0131ld\u0131\u011f\u0131 i\u00e7in, u\u00e7a\u011f\u0131n antenindeki al\u0131c\u0131 sistemin saatinde ya\u015fanan 1 nanosaniyelik (10<sup>-9<\/sup> saniye) bir \u00f6l\u00e7\u00fcm hatas\u0131, u\u00e7a\u011f\u0131n harita \u00fczerindeki konumunu an\u0131nda 30 santimetre kayd\u0131r\u0131r.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>6.3.2 Faz Merkezi (<em>Phase Center<\/em>) ve Asimetrik Buzlanma Etkisi<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Antenin fiziksel bir merkezi vard\u0131r, ancak sinyalin topland\u0131\u011f\u0131 ve hesaplaman\u0131n yap\u0131ld\u0131\u011f\u0131 nokta, antenin &#8220;Faz Merkezi&#8221; (<em>Phase Center<\/em>) ad\u0131 verilen elektromanyetik kalbidir. \u0130deal \u015fartlarda faz merkezi, antenin fiziksel tam ortas\u0131ndad\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ancak, u\u00e7ak k\u0131\u015f \u015fartlar\u0131nda u\u00e7arken <strong><em>GPS<\/em><\/strong> anteninin sadece sa\u011f taraf\u0131nda asimetrik bir <em>clear ice<\/em> (\u015feffaf buz) birikimi olursa veya d\u0131\u015f kapa\u011f\u0131n sadece bir b\u00f6l\u00fcm\u00fcnde mikro korozyon olu\u015fursa, buzun ve korozyonun yaratt\u0131\u011f\u0131 farkl\u0131 dielektrik sabiti nedeniyle faz merkezi fiziksel merkezin birka\u00e7 milimetre d\u0131\u015f\u0131na kayar. Bu kayma, sinyalin antenin i\u00e7ine girdi\u011fi s\u00fcreyi mikrosaniyeler d\u00fczeyinde de\u011fi\u015ftirir.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sonu\u00e7 olarak u\u00e7ak, kokpit ekranlar\u0131ndaki (<em>Navigation Display<\/em>) konumunu ger\u00e7e\u011fe k\u0131yasla metrelerce hatal\u0131 hesaplar. RNAV (Area Navigation) [Saha Seyr\u00fcseferi] veya RNP AR (Required Navigation Performance Authorization Required) gibi GPS&#8217;e ba\u011f\u0131ml\u0131 ve u\u00e7a\u011f\u0131 da\u011flar\u0131n aras\u0131ndan t\u00fcnel gibi bir y\u00f6r\u00fcngeden indiren son derece hassas yakla\u015fma prosed\u00fcrlerinde, bu birka\u00e7 metrelik kayma do\u011frudan bir <em>Controlled Flight Into Terrain<\/em> (CFIT) [Kontroll\u00fc U\u00e7u\u015fta Yere \u00c7arpma] riskine d\u00f6n\u00fc\u015f\u00fcr<em><sub>ICAO Doc 9613 PBN Manual.<\/sub><\/em><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>7.0 Koaksiyel \u0130letim Fizi\u011fi, <em>VSWR<\/em> Krizi ve Sistemsel Topraklama (<em>Bonding<\/em>)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Antenlerin d\u0131\u015f aerodinami\u011fini ve elektromanyetik al\u0131m g\u00fcc\u00fcn\u00fc masaya yat\u0131rd\u0131ktan sonra, al\u0131nan bu hayati sinyalin u\u00e7a\u011f\u0131n bas\u0131n\u00e7l\u0131 g\u00f6vdesi (<em>pressurized fuselage<\/em>) i\u00e7indeki radyo bilgisayarlar\u0131na nas\u0131l ula\u015ft\u0131\u011f\u0131na inmemiz gerekir. Bir u\u00e7akta ortalama 50 kilometre kablo bulunur ve bu kablolar\u0131n yarataca\u011f\u0131 elektromanyetik kirlilik (<em>EMI<\/em>), sinyalin iletimi i\u00e7in \u00f6l\u00fcmc\u00fcl bir labirenttir.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>7.1 <em>VSWR<\/em> (Voltage Standing Wave Ratio) [Gerilim Duran Dalga Oran\u0131] Fizi\u011fi<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Havac\u0131l\u0131k telsiz sistemlerinde, \u00fcniteden \u00e7\u0131kan kablo ve anten boyunca <em>empedans<\/em> (impedance) de\u011ferinin tam olarak 50 Ohm olmas\u0131 mutlak suretle yap\u0131lmas\u0131 zorunlu bir fiziksel e\u015fle\u015fmedir. Bu de\u011fer, g\u00fcc\u00fcn maksimum iletimi ve voltaj yans\u0131mas\u0131n\u0131n minimum olmas\u0131 i\u00e7in matematiksel olarak kan\u0131tlanm\u0131\u015f ideal noktad\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">E\u011fer anten taban\u0131nda korozyon varsa, anten g\u00f6vdeye tam oturmuyorsa veya koaksiyel kablo u\u00e7a\u011f\u0131n iskeleti etraf\u0131ndan d\u00f6\u015fenirken \u00e7ok keskin b\u00fck\u00fclm\u00fc\u015fse, bu b\u00fck\u00fclen noktadaki dielektrik yal\u0131tkan ezilir. Bu ezilme, kablonun <em>empedans<\/em> de\u011ferini 50 Ohm&#8217;dan \u00f6rne\u011fin 75 Ohm&#8217;a \u00e7\u0131kar\u0131r.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>7.1.1 Yans\u0131yan G\u00fc\u00e7 (<em>Reflected Power<\/em>) Senaryosu<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Telsiz g\u00f6nderme (<em>transmission<\/em>) yapt\u0131\u011f\u0131nda, \u00fcretilen elektromanyetik enerji kablo boyunca ilerler ve bu 75 Ohm&#8217;luk uyumsuzluk noktas\u0131na \u00e7arpar. Sinyal t\u0131pk\u0131 camdan yans\u0131yan bir \u0131\u015f\u0131k gibi bu bariyeri a\u015famaz ve kablo boyunca geriye, telsize do\u011fru yans\u0131r. \u0130leri giden dalga ile geri d\u00f6nen dalga kablonun i\u00e7inde birbirine \u00e7arparak dura\u011fan bir dalga (<em>Standing Wave<\/em>) olu\u015fturur. Bu orana <em>VSWR<\/em> denir. Yans\u0131yan bu devasa enerji, telsizin verici kat\u0131n\u0131 a\u015f\u0131r\u0131 \u0131s\u0131yla saniyeler i\u00e7inde eriterek kullan\u0131lmaz hale getirir. Bu y\u00fczden u\u00e7ak bak\u0131m ekipleri, anten de\u011fi\u015fimlerinden sonra mutlaka hassas cihazlarla hat <em>VSWR<\/em> \u00f6l\u00e7\u00fcm\u00fc yapar ve de\u011ferin <code>[1:1, 1.5:1]<\/code> limitleri aras\u0131nda oldu\u011funu do\u011frular<em><sub>FAA-H-8083-30B.<\/sub><\/em><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>7.2 <em>Skin Effect<\/em> (Y\u00fczey Etkisi) ve Kablo Geometrisi<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><em>VHF<\/em><\/strong>, <strong><em>DME<\/em><\/strong> ve <strong><em>GPS<\/em><\/strong> gibi y\u00fcksek frekansl\u0131 sinyaller, iletkenin merkezinden akmazlar. Elektromanyetik alan\u0131n yaratt\u0131\u011f\u0131 z\u0131t elektromotor kuvveti nedeniyle elektronlar, kablonun sadece en d\u0131\u015f y\u00fczeyine do\u011fru itilir. Buna <em>skin effect<\/em> (y\u00fczey etkisi) ad\u0131 verilir. Frekans ne kadar y\u00fcksekse, elektronlar y\u00fczeye o kadar ince bir tabaka halinde yap\u0131\u015f\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu nedenle u\u00e7aklardaki anten kablolar\u0131 evdeki elektrik kablolar\u0131 gibi kal\u0131n ve tek par\u00e7a bak\u0131rdan \u00fcretilmez. \u0130\u00e7i bo\u015f t\u00fcpler, g\u00fcm\u00fc\u015f kaplanm\u0131\u015f ince tellerin \u00f6r\u00fclmesi (<em>braided shield<\/em>) ve yal\u0131tkan malzemeler kullan\u0131l\u0131r. Bu ince m\u00fchendislik, hem u\u00e7a\u011f\u0131n toplam a\u011f\u0131rl\u0131\u011f\u0131n\u0131 d\u00fc\u015f\u00fcr\u00fcr hem de y\u00fcksek frekans\u0131n ak\u0131\u015f direncini s\u0131f\u0131ra yakla\u015ft\u0131r\u0131r.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>7.3 \u015easeleme (<em>Bonding<\/em>) ve <em>P-Static<\/em> (Ya\u011f\u0131\u015f Stati\u011fi) Tahliyesi<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">U\u00e7ak havada bulutlar\u0131n ve toz partik\u00fcllerinin i\u00e7inden saniyede 250 metre h\u0131zla ge\u00e7erken <em>triboelectric<\/em> etkiyle g\u00f6vde \u00fczerinde y\u00fczbinlerce voltluk statik elektrik birikir (<em>Precipitation Static<\/em>). Antenler bu elektri\u011fi g\u00f6vdeye iletemezse, antenin etraf\u0131nda <em>corona discharge<\/em> (korona de\u015farj\u0131) k\u0131v\u0131lc\u0131mlar\u0131 patlar ve sistem kendini elektromanyetik bir \u00e7\u0131\u011fl\u0131kla sa\u011f\u0131r eder.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu felaketi \u00f6nlemek i\u00e7in her bir anten, u\u00e7a\u011f\u0131n metal \u015fasesine miliohm seviyesinde bir elektriksel diren\u00e7le ba\u011flanmak (<em>bonding<\/em>) zorundad\u0131r. \u00d6rne\u011fin, 13.20 mm limitinde olmas\u0131 gereken bir a\u015f\u0131nma par\u00e7as\u0131n\u0131n 12.40 mm olarak yanl\u0131\u015f okunmas\u0131 kadar kritik bir di\u011fer bak\u0131m hatas\u0131, anten y\u00fczeyindeki boyan\u0131n ya da korozyonun tamamen temizlenmeden g\u00f6vdeye vidalanmas\u0131d\u0131r. E\u011fer anten ile g\u00f6vde aras\u0131ndaki diren\u00e7 0.1 Ohm de\u011ferini a\u015farsa, anten o statik y\u00fck\u00fc g\u00f6vdeye bo\u015faltamaz ve u\u00e7u\u015f s\u0131ras\u0131nda kendi yaratt\u0131\u011f\u0131 statik g\u00fcr\u00fclt\u00fcn\u00fcn i\u00e7inde tamamen k\u00f6r olur.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>8.0 Ana Kaynaklar ve <em>SMS<\/em> (Safety Management System) Sonucu<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bu makale boyunca incelenen t\u00fcm aerodinamik, fiziksel ve elektromanyetik krizler; havac\u0131l\u0131k sistemlerinde hi\u00e7bir par\u00e7an\u0131n sadece &#8220;elektronik bir cihaz&#8221; olmad\u0131\u011f\u0131n\u0131, devasa bir termodinamik ve ak\u0131\u015fkanlar dinami\u011fi b\u00fct\u00fcn\u00fcn\u00fcn par\u00e7as\u0131 oldu\u011funu kan\u0131tlamaktad\u0131r. T\u00fcm sistem emniyeti, prosed\u00fcrlerin ve \u00f6l\u00e7\u00fcmlerin kumpas\u0131n onda biri hassasiyetinde yap\u0131lmas\u0131n\u0131 gerektiren ve tolerans tan\u0131mayan <em>SMS<\/em> (Safety Management System) [Emniyet Y\u00f6netim Sistemi] disiplinine dayan\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ayr\u0131ca Bak\u0131n\u0131z:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"\">Bak\u0131n\u0131z: <a href=\"https:\/\/ibonav.aero\/learn\/radyo-seyrusefer-sistemleri-1-genel-bilgiler\/\" data-type=\"link\" data-id=\"https:\/\/ibonav.aero\/learn\/radyo-seyrusefer-sistemleri-1-genel-bilgiler\/\">Radyo Seyr\u00fcsefer Sistemleri #1 \u2013 Genel Bilgiler<\/a><\/li>\n\n\n\n<li class=\"\">Bak\u0131n\u0131z:<a href=\"https:\/\/ibonav.aero\/learn\/radyo-seyrusefer-sistemleri-2-ndb-ve-adf-sistemleri\/\" data-type=\"link\" data-id=\"https:\/\/ibonav.aero\/learn\/radyo-seyrusefer-sistemleri-2-ndb-ve-adf-sistemleri\/\"> Radyo Seyr\u00fcsefer Sistemleri #2 \u2013 <strong><em>NDB<\/em><\/strong> (Non-Directional Beacon) [Y\u00f6ns\u00fcz Radyo Far\u0131] ve <strong><em>ADF<\/em><\/strong> (Automatic Direction Finder) [Otomatik Y\u00f6n Bulucu] Sistemleri<\/a><\/li>\n\n\n\n<li class=\"\">Bak\u0131n\u0131z: <a href=\"https:\/\/ibonav.aero\/learn\/radyo-seyrusefer-sistemleri-4-vor-sistemleri\/\" data-type=\"link\" data-id=\"https:\/\/ibonav.aero\/learn\/radyo-seyrusefer-sistemleri-4-vor-sistemleri\/\">Radyo Seyr\u00fcsefer Sistemleri #4 \u2013 <strong><em>VOR<\/em><\/strong> (VHF Omnidirectional Range) [VHF \u00c7ok Y\u00f6nl\u00fc Radyo Frekans\u0131] Sistemleri<\/a><\/li>\n\n\n\n<li class=\"\">Bak\u0131n\u0131z: <a href=\"https:\/\/ibonav.aero\/learn\/radyo-seyrusefer-sistemleri-6-marker-beacon-sistemleri\/\" data-type=\"link\" data-id=\"https:\/\/ibonav.aero\/learn\/radyo-seyrusefer-sistemleri-6-marker-beacon-sistemleri\/\">Radyo Seyr\u00fcsefer Sistemleri #6 \u2013 <strong><em>Marker Beacon<\/em><\/strong> [<em>Marker radyo bik\u0131n\u0131<\/em>] Sistemleri<\/a><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"\">ICAO Doc 9859 Safety Management Manual (SMM) (4th Ed. 2018)<\/li>\n\n\n\n<li class=\"\">ICAO Doc 8168 Aircraft Operations (PANS-OPS) Vol. II Construction of Visual and Instrument Flight Procedures (6th Ed. 2014)<\/li>\n\n\n\n<li class=\"\">ICAO Annex 10 Aeronautical Telecommunications Vol. I (Radio Navigation Aids) (7th Ed. Amend. 93 11\/23)<\/li>\n\n\n\n<li class=\"\">ICAO Annex 10 Aeronautical Telecommunications Vol. V (Aeronautical Radio Frequencies) (3rd Ed. Amend. 89 11\/14)<\/li>\n\n\n\n<li class=\"\">FAA Aviation Maintenance Technician Handbook \u2013 General (FAA-H-8083-30B)<\/li>\n\n\n\n<li class=\"\">Boeing 737 Aircraft Maintenance Manual (AMM)<\/li>\n\n\n\n<li class=\"\">Boeing 737 Wiring Diagram Manual (WDM)<\/li>\n\n\n\n<li class=\"\">Boeing 737 Flight Crew Operations Manual (FCOM) Vol. 2<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n","protected":false},"excerpt":{"rendered":"<p>Giri\u015f Havac\u0131l\u0131k end\u00fcstrisinde, devasa turbofan motorlar\u0131n \u00fcretti\u011fi muazzam itki g\u00fcc\u00fc<\/p>\n","protected":false},"author":12,"featured_media":2841,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18,829],"tags":[828,135,209],"class_list":["post-4758","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-boeing-737","category-sistemler","tag-cns","tag-icao","tag-navigasyon"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>B737 Anten Sistemlerinin Aerodinamik Mimarisi ve Elektromanyetik \u0130\u015flevi \/ WXR \u2013 ILS, RADALT \u2013 DME, VOR \u2013 HF, VSWR \u2013 P-Static | ICAO &amp; 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