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Akaflieg Darmstadt D-39
The Akaflieg Darmstadt D-39 was a single seat motor glider derived from the D-38 sailplane. Built in Germany in the late 1970s, it was not intended for production and only one was constructed.
==Design and development==
The D-39 was a motorised version of the D-38 sailplane, with wings moved down from the latter's shoulder-wing position to the bottom of the fuselage. A Limbach SL 1700 flat four engine was conventionally mounted in the nose; the propeller could be removed but not folded away in flight. The wings, with 4° of dihedral, tail and monocoque fuselage were formed from glass fibre balsa sandwiches and the ailerons from glass fibre/Klégécel foam sandwiches. The D-38 had an all moving T-tailplane, fitted with a Flettner tab. It landed on a retractable monowheel, fitted with a drum brake and assisted by a small, fixed tailwheel.〔
The D-39 was first flown on 28 June 1979.〔 By July 1982 it had been modified into the D-39b, with a greater span, revised wing roots and fitted with a three bladed Hoffmann Propeller airscrew with three blades and three pitch positions. The D-39 was not further developed nor put into production.〔
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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