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The Viper Aircraft Viperfan was an American homebuilt aircraft that was designed and produced by Viper Aircraft of Kennewick, Washington, introduced in the late 1990s. The aircraft was intended to be supplied as a kit for amateur construction, but only one was ever built.〔Purdy, Don: ''AeroCrafter - Homebuilt Aircraft Sourcebook, Fifth Edition'', page 361. BAI Communications, 15 July 1998. ISBN 0-9636409-4-1〕〔Freeze, Di (November 2005). "The Path to the Viperjet MkII – The Trickest Jet on the Block". Pacific Northwest Aviation & Business Journal (Airport Journals) 4 (10): 8C–14C.〕 ==Design and development== The Viperfan was designed to resemble a military jet trainer, but powered by a pusher piston engine. It featured a cantilever low-wing, a two-seats-in-tandem enclosed cockpit under a bubble canopy, retractable tricycle landing gear and a single engine in pusher configuration.〔 The aircraft was made from composite materials. Its span wing mounted flaps and had a wing area of . The cabin width was . The acceptable power range was and the standard engines envisioned to be used were the Continental IO-520 and TSIO-520, or the Continental TSIOL-550 powerplant, driving the tail-mounted propeller through an extension shaft.〔 The Viperfan had a typical empty weight of and a gross weight of , giving a useful load of . With full fuel of the payload for the pilot, passenger and baggage was . The aircraft was fully aerobatic and stressed to +/-6g.〔 The standard day, sea level, no wind, take off with a engine was and the landing roll was .〔 The manufacturer estimated the construction time from the planned kit to be 2000 hours.〔 The aircraft was not a success due to problems with vibrations in the engine-to-propeller extension shaft and so the aircraft was converted to turbojet power. Eventually it was completely redesigned to become the Viper Aircraft ViperJet MKII.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Viper Aircraft Viperfan」の詳細全文を読む スポンサード リンク
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