{"id":17239,"date":"2019-02-26T20:49:23","date_gmt":"2019-02-26T18:49:23","guid":{"rendered":"http:\/\/www.aviationmuseum.eu\/Blogvorm\/wp-content\/uploads\/2019\/02\/Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force.jpg"},"modified":"2019-02-26T20:50:44","modified_gmt":"2019-02-26T18:50:44","slug":"koolhoven-f-k-51-429-replica-royal-netherlands-air-force","status":"inherit","type":"attachment","link":"https:\/\/aviationmuseum.eu\/Blogvorm\/nationaal-militair-museum\/koolhoven-f-k-51-429-replica-royal-netherlands-air-force\/","title":{"rendered":"Koolhoven F.K.51"},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","meta":[],"class_list":["post-17239","attachment","type-attachment","status-inherit","hentry"],"description":{"rendered":"<p class=\"attachment\"><a href='https:\/\/aviationmuseum.eu\/Blogvorm\/wp-content\/uploads\/2019\/02\/Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"420\" height=\"268\" src=\"https:\/\/aviationmuseum.eu\/Blogvorm\/wp-content\/uploads\/2019\/02\/Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force-420x268.jpg\" class=\"attachment-medium size-medium\" alt=\"Koolhoven F.K.51 429 (replica) Royal Netherlands Air Force, Nationaal Militair Museum (NMM) Soest, Netherlands\" srcset=\"https:\/\/aviationmuseum.eu\/Blogvorm\/wp-content\/uploads\/2019\/02\/Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force-420x268.jpg 420w, https:\/\/aviationmuseum.eu\/Blogvorm\/wp-content\/uploads\/2019\/02\/Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force-240x153.jpg 240w, https:\/\/aviationmuseum.eu\/Blogvorm\/wp-content\/uploads\/2019\/02\/Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force-728x465.jpg 728w, https:\/\/aviationmuseum.eu\/Blogvorm\/wp-content\/uploads\/2019\/02\/Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force-600x383.jpg 600w, https:\/\/aviationmuseum.eu\/Blogvorm\/wp-content\/uploads\/2019\/02\/Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force.jpg 1200w\" sizes=\"auto, (max-width: 420px) 100vw, 420px\" \/><\/a><\/p>\n<p>Koolhoven F.K.51 429 (replica) Royal Netherlands Air Force | Rob Vogelaar<br \/>\nThe Koolhoven F.K.51 was the winning design in a 1935 Dutch government contest for a new trainer. Designed by Frederick Koolhoven the prototype biplane trainer first flew on 25 May 1935. The aircraft was an equal-span biplane designed to use a variety of engines between 250hp (186kW) and 500hp (373kW). It was a two-seater and had a tailwheel undercarriage. The Royal Dutch air force (LVA) ordered 25 aircraft in 1936 and 1937, powered by a 270hp (201kW) Armstrong Siddeley Cheetah V radial engine. A further 29 aircraft were later bought with 350hp (261kW) Armstrong Siddeley Cheetah IX engine. The Dutch Naval Aviation Service ordered 29 aircraft each powered by a 450hp (335kW) Pratt &#038; Whitney radials. The Royal Dutch East Indies Army bought 38 aircraft between 1936 and 1938 each powered by a 420hp (313kW) Wright Whirlwind.<\/p>\n"},"caption":{"rendered":"<p>Koolhoven F.K.51 429 (replica) Royal Netherlands Air Force | Rob Vogelaar The Koolhoven F.K.51 was the winning design in a 1935 Dutch government contest for&#8230;<\/p>\n"},"alt_text":"Koolhoven F.K.51 429 (replica) Royal Netherlands Air Force, Nationaal Militair Museum (NMM) Soest, Netherlands","media_type":"image","mime_type":"image\/jpeg","media_details":{"width":1200,"height":766,"file":"2019\/02\/Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force.jpg","sizes":{"thumbnail":{"file":"Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force-240x153.jpg","width":240,"height":153,"mime_type":"image\/jpeg","source_url":"https:\/\/aviationmuseum.eu\/Blogvorm\/wp-content\/uploads\/2019\/02\/Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force-240x153.jpg"},"medium":{"file":"Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force-420x268.jpg","width":420,"height":268,"mime_type":"image\/jpeg","source_url":"https:\/\/aviationmuseum.eu\/Blogvorm\/wp-content\/uploads\/2019\/02\/Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force-420x268.jpg"},"large":{"file":"Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force-728x465.jpg","width":728,"height":465,"mime_type":"image\/jpeg","source_url":"https:\/\/aviationmuseum.eu\/Blogvorm\/wp-content\/uploads\/2019\/02\/Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force-728x465.jpg"},"wysija-newsletters-max":{"file":"Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force-600x383.jpg","width":600,"height":383,"mime_type":"image\/jpeg","source_url":"https:\/\/aviationmuseum.eu\/Blogvorm\/wp-content\/uploads\/2019\/02\/Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force-600x383.jpg"},"content-single":{"file":"Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force-777x437.jpg","width":777,"height":437,"mime_type":"image\/jpeg","source_url":"https:\/\/aviationmuseum.eu\/Blogvorm\/wp-content\/uploads\/2019\/02\/Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force-777x437.jpg"},"content-grid":{"file":"Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force-180x101.jpg","width":180,"height":101,"mime_type":"image\/jpeg","source_url":"https:\/\/aviationmuseum.eu\/Blogvorm\/wp-content\/uploads\/2019\/02\/Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force-180x101.jpg"},"content-list":{"file":"Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force-260x146.jpg","width":260,"height":146,"mime_type":"image\/jpeg","source_url":"https:\/\/aviationmuseum.eu\/Blogvorm\/wp-content\/uploads\/2019\/02\/Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force-260x146.jpg"},"cp-thumb-xl":{"file":"Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force-373x210.jpg","width":373,"height":210,"mime_type":"image\/jpeg","source_url":"https:\/\/aviationmuseum.eu\/Blogvorm\/wp-content\/uploads\/2019\/02\/Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force-373x210.jpg"},"cp-thumb-small":{"file":"Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force-120x67.jpg","width":120,"height":67,"mime_type":"image\/jpeg","source_url":"https:\/\/aviationmuseum.eu\/Blogvorm\/wp-content\/uploads\/2019\/02\/Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force-120x67.jpg"},"full":{"file":"Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force.jpg","width":1200,"height":766,"mime_type":"image\/jpeg","source_url":"https:\/\/aviationmuseum.eu\/Blogvorm\/wp-content\/uploads\/2019\/02\/Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force.jpg"}},"image_meta":{"aperture":"1.8","credit":"","camera":"DSC-RX100","caption":"Koolhoven F.K.51 429 (replica) Royal Netherlands Air Force","created_timestamp":"1418566535","copyright":"","focal_length":"10.4","iso":"400","shutter_speed":"0.00625","title":"Koolhoven F.K.51 429 (replica) Royal Netherlands Air Force","orientation":"1","keywords":[]}},"post":1254,"source_url":"https:\/\/aviationmuseum.eu\/Blogvorm\/wp-content\/uploads\/2019\/02\/Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force.jpg","filename":"Koolhoven-F.K.51-429-replica-Royal-Netherlands-Air-Force.jpg","filesize":416214,"_links":{"self":[{"href":"https:\/\/aviationmuseum.eu\/Blogvorm\/wp-json\/wp\/v2\/media\/17239","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aviationmuseum.eu\/Blogvorm\/wp-json\/wp\/v2\/media"}],"about":[{"href":"https:\/\/aviationmuseum.eu\/Blogvorm\/wp-json\/wp\/v2\/types\/attachment"}],"author":[{"embeddable":true,"href":"https:\/\/aviationmuseum.eu\/Blogvorm\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/aviationmuseum.eu\/Blogvorm\/wp-json\/wp\/v2\/comments?post=17239"}],"wp:attached-to":[{"embeddable":true,"post_type":"page","id":1254,"href":"https:\/\/aviationmuseum.eu\/Blogvorm\/wp-json\/wp\/v2\/pages\/1254"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}