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Akaflieg Braunschweig SB-12
The Akaflieg Braunschweig SB-12 is a single seat, Standard Class sailplane designed around 1980 by German technical university students to test out a new wing profile from the German Aerospace Centre. It was not intended for production, but the sole SB-12 remains active in 2010.
==Design and development==
The Akaflieg Braunschweig or Akademische Fliegergruppe Braunschweig ((英語:The Brunswick 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 Brunswick students began the design of the Standard Class SB-12 in mid-1979 and the first flight was made on 9 April 1980. It was not intended for production but to test out a new wing aerodynamic profile designed by the German Aerospace Centre (DFVLR) for high cruising performance. The wing of the SB-12 has single, I-section spars, with carbon fibre flanges and GRP webs. The skins are carbon fibre and polymeric foam. The wings are mounted at mid-fuselage at an incidence of 0.5° and with 3° of dihedral. They carry GRP ailerons and wide span airbrakes but no spoiler or flaps.〔
The fuselage is a GRP monocoque with a front hinged canopy over the single seat cockpit and a tank for 150 kg (331 lb) of water ballast. The SB-12 has a T-tail, with tailplane and elevators set on top of a straight edged, only slightly tapered fin and rudder. The fixed surfaces are formed from GRP and plastic foam sandwich, the moving surfaces using only GRP. Its undercarriage has a retractable, unsprung monowheel, fitted with an internal drum brake, with a fixed, partly recessed tailwheel.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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