{"id":141,"date":"2007-04-29T15:18:24","date_gmt":"2007-04-29T07:18:24","guid":{"rendered":"http:\/\/taiwanairpower.org\/blog\/?p=141"},"modified":"2008-01-21T12:04:32","modified_gmt":"2008-01-21T04:04:32","slug":"ils-and-aiff-on-the-idf","status":"publish","type":"post","link":"https:\/\/taiwanairpower.org\/blog\/?p=141","title":{"rendered":"ILS and AIFF on the IDF"},"content":{"rendered":"<p>I had been wondering about the function of the black antenna retrofitted to\u00a0IDF&#8217;s lower fuselage on the port side during the post-production upgrade (see the photos below).\u00a0\u00a0The latest issue of\u00a0a\u00a0local military magazine, <em>Illustrated Guide of Weapons\u00a0and Tactics<\/em>\u00a0(\u5175\u5668\u6230\u8853\u5716\u89e3),\u00a0indicated that it was an ILS (Instrument Landing System) antenna.\u00a0 It&#8217;s a very simple answer, although the question has puzzled me for several years.\u00a0 Thanks!<\/p>\n<div style=\"text-align: center\"><img decoding=\"async\" src=\"http:\/\/taiwanairpower.org\/blog\/wp-content\/uploads\/2007\/04\/belly.jpg\" \/><\/div>\n<p>But another question comes up.\u00a0 Recalling another magazine said that the ILS antenna was fitted on IDF&#8217;s canopy, I asked a pilot for confirmation duirng the 2001 Tainan AFB openhouse.\u00a0 He pointed to me the curly, twisted wires on the canopy (shown below).\u00a0 So if the black antenna is the ILS antenna, what are the wires on the canopy for?\u00a0 Are they only the interim solution?\u00a0 I doubt the way they were fitted can withstand the vibrations and high-G turns.<\/p>\n<div style=\"text-align: center\"><img decoding=\"async\" src=\"http:\/\/taiwanairpower.org\/blog\/wp-content\/uploads\/2007\/04\/ils.jpg\" \/><\/div>\n<p>The <em>Illustrated Guide<\/em> also referred to the single gray antenna under the nose section, right aft the radome, as an ILS antenna.\u00a0 I don&#8217;t think they are correct this time.\u00a0 It should be the fifth AIFF antenna.\u00a0 All single-seat IDF, including the IDF II, are fitted (or have been retrofitted) with AIFF, while the two-seaters are not, as can be seen in the following two photos.<\/p>\n<div style=\"text-align: center\"><img decoding=\"async\" src=\"http:\/\/taiwanairpower.org\/blog\/wp-content\/uploads\/2007\/04\/fck1a.jpg\" \/><\/div>\n<p>\u00a0<\/p>\n<div style=\"text-align: center\"><img decoding=\"async\" src=\"http:\/\/taiwanairpower.org\/blog\/wp-content\/uploads\/2007\/04\/fck1b.jpg\" \/><\/div>\n<p>Many military books\/magazines\/websites identify the AIFF as the AN\/APX-113(V), although I have not found any official sources providing information on the type number.\u00a0 BAE Systems&#8217; website has an image showing the AN\/APX-113(V) system, but with only four antennae.\u00a0 Could the AIFF on IDF be a different variant of the AN\/APX-113?\u00a0 Or\u00a0I am making the question too complicated again and the number of antennae really does not matter?<\/p>\n<div style=\"text-align: center\"><img decoding=\"async\" src=\"http:\/\/taiwanairpower.org\/blog\/wp-content\/uploads\/2007\/04\/iff.jpg\" \/><\/div>\n<div style=\"text-align: center\">(BAE Systems photo)<\/div>\n<p>\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I had been wondering about the function of the black antenna retrofitted to\u00a0IDF&#8217;s lower fuselage on the port side during the post-production upgrade (see the photos below).\u00a0\u00a0The latest issue of\u00a0a\u00a0local military magazine,&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32,13],"tags":[],"class_list":["post-141","post","type-post","status-publish","format-standard","hentry","category-air-force","category-idf-ching-kuo"],"_links":{"self":[{"href":"https:\/\/taiwanairpower.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/141","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/taiwanairpower.org\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/taiwanairpower.org\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/taiwanairpower.org\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/taiwanairpower.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=141"}],"version-history":[{"count":0,"href":"https:\/\/taiwanairpower.org\/blog\/index.php?rest_route=\/wp\/v2\/posts\/141\/revisions"}],"wp:attachment":[{"href":"https:\/\/taiwanairpower.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=141"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/taiwanairpower.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=141"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/taiwanairpower.org\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=141"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}