{"id":242306,"date":"2010-01-28T11:23:14","date_gmt":"2010-01-28T16:23:14","guid":{"rendered":"http:\/\/blog.modernmechanix.com\/?p=8954"},"modified":"2010-01-28T11:23:14","modified_gmt":"2010-01-28T16:23:14","slug":"whistling-beacons-mark-airfield-for-blind-landings-dec-1933","status":"publish","type":"post","link":"https:\/\/mereja.media\/index\/242306","title":{"rendered":"Whistling Beacons Mark Airfield for Blind Landings  (Dec, 1933)"},"content":{"rendered":"<p><div class=\"galContent\"><a href=\"http:\/\/blog.modernmechanix.com\/2010\/01\/28\/whistling-beacons-mark-airfield-for-blind-landings\/\"><img decoding=\"async\" src=\"http:\/\/blog.modernmechanix.com\/mags\/qf\/c\/ModernMechanix\/12-1933\/med_airfield_beacons.jpg\" border=0><\/a><\/div>\n<\/p>\n<blockquote>\n<p><strong>Whistling Beacons Mark Airfield for Blind Landings<\/strong><\/p>\n<p>HIGH pitched whistles to designate boundaries of an airport make it possible for a pilot to make a blind landing, recent experiments have shown.<\/p>\n<p>The newly designed whistles, called sonic marker beacons, send out fan shaped beams of sound by means of which the aviator can determine definitely the length of the airfield. <span id=\"more-8954\"><\/span>The pilot, guided to the airport by a radio beacon, selects an altitude of 2,000 feet and within 500 feet of the boundary line picks up the beacon sound with special listening equipment.<\/p>\n<p>Sound dies away 500 feet inside each end of the field, indicating its length.<\/p>\n<\/blockquote>\n<p><a href=\"http:\/\/feedads.g.doubleclick.net\/~a\/S4q0Fvr9B6fS-vKTi7y7HlhyzGo\/0\/da\"><img decoding=\"async\" src=\"http:\/\/feedads.g.doubleclick.net\/~a\/S4q0Fvr9B6fS-vKTi7y7HlhyzGo\/0\/di\" border=\"0\" ismap=\"true\"><\/img><\/a><br \/>\n<a href=\"http:\/\/feedads.g.doubleclick.net\/~a\/S4q0Fvr9B6fS-vKTi7y7HlhyzGo\/1\/da\"><img decoding=\"async\" src=\"http:\/\/feedads.g.doubleclick.net\/~a\/S4q0Fvr9B6fS-vKTi7y7HlhyzGo\/1\/di\" border=\"0\" ismap=\"true\"><\/img><\/a><\/p>\n<div class=\"feedflare\">\n<a href=\"http:\/\/feeds.feedburner.com\/~ff\/ModernMechanix?a=oQ3q_zkY1ho:rwwHHhXf-Hk:ACf-c_HutVc\"><img decoding=\"async\" src=\"http:\/\/feeds.feedburner.com\/~ff\/ModernMechanix?d=ACf-c_HutVc\" border=\"0\"><\/img><\/a> <a href=\"http:\/\/feeds.feedburner.com\/~ff\/ModernMechanix?a=oQ3q_zkY1ho:rwwHHhXf-Hk:yIl2AUoC8zA\"><img decoding=\"async\" src=\"http:\/\/feeds.feedburner.com\/~ff\/ModernMechanix?d=yIl2AUoC8zA\" border=\"0\"><\/img><\/a> <a href=\"http:\/\/feeds.feedburner.com\/~ff\/ModernMechanix?a=oQ3q_zkY1ho:rwwHHhXf-Hk:V_sGLiPBpWU\"><img decoding=\"async\" src=\"http:\/\/feeds.feedburner.com\/~ff\/ModernMechanix?i=oQ3q_zkY1ho:rwwHHhXf-Hk:V_sGLiPBpWU\" border=\"0\"><\/img><\/a> <a href=\"http:\/\/feeds.feedburner.com\/~ff\/ModernMechanix?a=oQ3q_zkY1ho:rwwHHhXf-Hk:F7zBnMyn0Lo\"><img decoding=\"async\" src=\"http:\/\/feeds.feedburner.com\/~ff\/ModernMechanix?i=oQ3q_zkY1ho:rwwHHhXf-Hk:F7zBnMyn0Lo\" border=\"0\"><\/img><\/a> <a href=\"http:\/\/feeds.feedburner.com\/~ff\/ModernMechanix?a=oQ3q_zkY1ho:rwwHHhXf-Hk:qj6IDK7rITs\"><img decoding=\"async\" src=\"http:\/\/feeds.feedburner.com\/~ff\/ModernMechanix?d=qj6IDK7rITs\" border=\"0\"><\/img><\/a> <a href=\"http:\/\/feeds.feedburner.com\/~ff\/ModernMechanix?a=oQ3q_zkY1ho:rwwHHhXf-Hk:gIN9vFwOqvQ\"><img decoding=\"async\" src=\"http:\/\/feeds.feedburner.com\/~ff\/ModernMechanix?i=oQ3q_zkY1ho:rwwHHhXf-Hk:gIN9vFwOqvQ\" border=\"0\"><\/img><\/a> <a href=\"http:\/\/feeds.feedburner.com\/~ff\/ModernMechanix?a=oQ3q_zkY1ho:rwwHHhXf-Hk:UT3xtbGYFzA\"><img decoding=\"async\" src=\"http:\/\/feeds.feedburner.com\/~ff\/ModernMechanix?d=UT3xtbGYFzA\" border=\"0\"><\/img><\/a>\n<\/div>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/feeds.feedburner.com\/~r\/ModernMechanix\/~4\/oQ3q_zkY1ho\" height=\"1\" width=\"1\"\/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Whistling Beacons Mark Airfield for Blind Landings HIGH pitched whistles to designate boundaries of an airport make it possible for a pilot to make a blind landing, recent experiments have shown. The newly designed whistles, called sonic marker beacons, send out fan shaped beams of sound by means of which the aviator can determine definitely [&hellip;]<\/p>\n","protected":false},"author":5356,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-242306","post","type-post","status-publish","format-standard","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/posts\/242306","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/users\/5356"}],"replies":[{"embeddable":true,"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/comments?post=242306"}],"version-history":[{"count":0,"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/posts\/242306\/revisions"}],"wp:attachment":[{"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/media?parent=242306"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/categories?post=242306"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/tags?post=242306"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}