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Built but never flown aircraft?
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<blockquote data-quote="Sentinel Chicken" data-source="post: 2259" data-attributes="member: 18"><p>In 1949 the Yakovlev OKB rolled out the Yak-1000 high-speed research aircraft which was the Russian answer to the Douglas Skystreak jet research aircraft. The smallest possible fuselage was built around a Lyulka AL-1 turbojet engine. The unusual bicycle landing gear arrangement made for horrendous ground handling characteristics and it was cancelled without ever having flown. </p><p></p><p>The Rockwell XFV-12 probably also falls into the buillt but never flown category as well. </p><p></p><p>The Fairchild/Dornier 728JET I don't believe ever took to the air either. </p><p></p><p>Don't forget also the Avro Arrow 2. When the Diefenbaker government cancelled the Avro CF-105 Arrow in 1959, only the J75-powered Arrow 1s had flown (there were 5). There was one completed Arrow 2 and four more Arrow 2s under construction at Avro Canada's plant at Malton (site of today's Pearson International Airport). The Arrow 2 was the definitive production version and much more capable than the Arrow 1.</p><p></p><p>The Arrow 2 had the definitive Orenda Iroquois engine which was far more powerful than the J75 and would have bestowed the Arrow Mk.2 with impressive performance specs.</p><p></p><p>Interestingly, a lot of the technology developed for the Iroquois engine would subsequently go to Rolls-Royce as a lot of Orenda's engineers went to work for RR. The engine that resulted was the Rolls-Royce Olympus.</p><p></p><p>And then there's the little-known Vought XF5U-1 "Flying Pancake" which had a revolutionary saucer layout to generate increased lift and thus shorten landing distances and lower landing speeds (making it ideal for carrier operations). The lack of wings meant it was compact and not needing any complex wingfold mechanisms. Two prototypes were completed in late 1945 and it wasn't until 1947 that flight testing was scheduled to begin at Edwards AFB. However, by this time the Navy lost interest in propeller-driven fighters and the prototypes never flew.</p><p></p><p>The Yak-44 was intended to provide AEW/AWACS cover for Russian carrier battlegroups centered around the new Admiral Kuznetzov-class carriers. I think a single prototype was built but never flown with the subsequent drawdown in Russian naval forces.</p></blockquote><p></p>
[QUOTE="Sentinel Chicken, post: 2259, member: 18"] In 1949 the Yakovlev OKB rolled out the Yak-1000 high-speed research aircraft which was the Russian answer to the Douglas Skystreak jet research aircraft. The smallest possible fuselage was built around a Lyulka AL-1 turbojet engine. The unusual bicycle landing gear arrangement made for horrendous ground handling characteristics and it was cancelled without ever having flown. The Rockwell XFV-12 probably also falls into the buillt but never flown category as well. The Fairchild/Dornier 728JET I don't believe ever took to the air either. Don't forget also the Avro Arrow 2. When the Diefenbaker government cancelled the Avro CF-105 Arrow in 1959, only the J75-powered Arrow 1s had flown (there were 5). There was one completed Arrow 2 and four more Arrow 2s under construction at Avro Canada's plant at Malton (site of today's Pearson International Airport). The Arrow 2 was the definitive production version and much more capable than the Arrow 1. The Arrow 2 had the definitive Orenda Iroquois engine which was far more powerful than the J75 and would have bestowed the Arrow Mk.2 with impressive performance specs. Interestingly, a lot of the technology developed for the Iroquois engine would subsequently go to Rolls-Royce as a lot of Orenda's engineers went to work for RR. The engine that resulted was the Rolls-Royce Olympus. And then there's the little-known Vought XF5U-1 "Flying Pancake" which had a revolutionary saucer layout to generate increased lift and thus shorten landing distances and lower landing speeds (making it ideal for carrier operations). The lack of wings meant it was compact and not needing any complex wingfold mechanisms. Two prototypes were completed in late 1945 and it wasn't until 1947 that flight testing was scheduled to begin at Edwards AFB. However, by this time the Navy lost interest in propeller-driven fighters and the prototypes never flew. The Yak-44 was intended to provide AEW/AWACS cover for Russian carrier battlegroups centered around the new Admiral Kuznetzov-class carriers. I think a single prototype was built but never flown with the subsequent drawdown in Russian naval forces. [/QUOTE]
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