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Akaflieg Braunschweig SB-6 Nixope
The Akaflieg Braunschweig SB-6 Nixope ((英語:Water Sprite)) was an early (1961) GRP high performance single seat glider designed and built in Germany by aeronautical students from Brunswick University. It competed in the 1961 German National gliding competition, coming sixth, and led directly to two further GRP aircraft.
==Design and development==
The 1961 SB-6 Nixope was one of the earliest gliders with a glass-fibre structure following two other German designs, the 1957 Akaflieg Stuttgart FS-24 Phönix and the 1958 Hirth Hi 25 Kria. Like the Phönix, the Nixope was designed and built within a university aeronautical engineering department but the NIxope team was a traditional undergraduate one, headed by Björn Stander then in his final year. At a time when GRP techniques were novel and evolving, the Nixobe was very ambitious, with a wing of aspect ratio 25, compared with 17.8 for the Phönix and 14.3 for the Kria. Stander had visited Nabern to learn about GRP construction, though the Braunschweig group developed some techniques of their own.〔
The Nixope was mostly constructed from GRP and balsa. Its cantilever shoulder wing was built around a broad GRP and balsa box spar, with closely spaced () balsa and GRP ribs. Balsa skinning was followed by a GRP outer layer, without the use of female moulds. The wings were straight tapered, with greater taper on the outer sections. At the tips the leading edges were rounded off. Its simple wooden ailerons were quite short, filling only about 25% of the span. To keep the wing structure simple there were no flaps or airbrakes.〔〔 The wing was mounted with 1.5° of dihedral.〔
The fuselage was built in a similar way, with thick planking. It had a very smoothly streamlined and small cross-section shape, tapering to the tail. The pilot was in a fully reclining seat, allowing a long, detachable, single piece, blown plexiglass canopy which did not interrupt the fuselage profile. A retractable, fully enclosed monowheel, with a brake, was fitted. The empennage was conventional and simply wooden, with an all moving tailplane mounted on a broad, tall, straight edged fin just above the fuselage. The rudder, straight edged, forward swept and hinged well clear of the elevator, extended down to the keel where there was a small tail bumper. The elevator but not the rudder was balanced. As the Nixope had no wing mounted airbrakes, a diameter ribbon parachute was mounted in the tail.〔〔〔
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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