|
The Akaflieg Stuttgart FS-28 Avispa ((英語:Wasp)) is a single engine, twin boom pusher configuration light sports and utility aircraft designed at the University of Stuttgart in Germany in the 1970s. Unusually, it has an inverted V-tail. The sole example remained active in 2010. ==Design and development== The Akaflieg Stuttgart or Akademische Fliegergruppe Stuttgart ((英語:The Stuttgart Academic Flying Group)) is one of some fourteen German student flying groups attached to and supported by their home Technical University. Several have designed and built aircraft, often technically advanced and leading the development of gliders in particular.〔 The Avispa was their first powered aircraft. The project, supported by the Fraunhofer Institute and the Ministry of Economics of Baden-Württemberg, was intended to transfer the knowledge about high performance aerodynamics and composite materials gained from glider design to light powered aircraft.〔 The Avispa is a twin-boom, pusher configuration low mid-wing monoplane. The wing has an Eppler profile, quite new in the 1970s, and is straight tapered with a swept leading edge and unswept trailing edge, resulting in 6.75° sweep at quarter chord. It is constructed from a sandwich of glass fibre and rigid foam and has 4.5° of dihedral. Fowler flaps, in two sections separated by the tail booms, fill the trailing edge out to the plain, untabbed ailerons. Accommodation and engine are in a central nacelle of glass reinforced plastic/honeycomb sandwich. Side-by-side seating is enclosed under a generous, three section canopy entered via upward, centreline hinged doors. A 115 hp (86 kW) flat four Lycoming O-235 piston engine, mounted in the rear of the nacelle with its output shaft well above the wing and booms and air-cooled via a semi-annular intake behind the cabin, drove a three-blade pusher propeller with a large spinner, designed to minimise noise. The three blade propeller was later replaced by a two-blade one.〔〔 The tail booms are slender and linked at the rear by the unusual inverted Vee empennage. The straight edged, fixed rear surfaces are constructed as the wing but the control surfaces are fabric covered, with spring tabs. The Avispa has a retractable tricycle undercarriage with glass fibre shock absorbers, mainwheel hydraulic brakes and a steerable nosewheel.〔 The sole Avispa, ''V-1, D-EAFS'', made its first flight on 20 December 1972. 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「Akaflieg Stuttgart FS-28 Avispa」の詳細全文を読む スポンサード リンク
|