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Siren Edelweiss
The Siren C.30 Edelweiss (or C.30S) is a 15 m span, Standard Class sailplane designed in France in the early 1960s. The Edelweiss came second in its class at the 1963 World Gliding Championships (WGC) and first in its class two years later. Several are still flying in France and elsewhere in 2010.
==Design and development==
The Edelweiss is a 15 m class, single seat, shoulder wing sailplane with a butterfly tail, built mostly from wood. The wing has a single spar and is skinned with 8 mm foam-bonded plywood. It has almost constant chord; it had forward sweep on the two prototypes but production Edelweiss have unswept wings. The ailerons are metal and are shorter on production aircraft. Inboard airbrakes, again shorter in production aircraft, can extend from both upper and lower surfaces. The butterfly tail consists of two all moving surfaces, with wood sandwich leading edges and fabric covering elsewhere. Both carry trim tabs.〔
The slender fuselage is assembled from two formed, foam-bonded ply shells, each with inbuilt longerons. Nose and tail cones are of laminated plastic. The pilot sits in a semi-reclining position, under a long, starboard hinged, canopy which ends at the wing leading edge. The prototypes had longer noses than later aircraft. The Edelweiss lands on a fixed, sprung, monowheel undercarriage, fitted with a wheel brake operated jointly with the airbrakes.〔
The Edelweiss flew for the first time on 25 September 1962. An initial production batch of 15 was begun in January 1965.〔
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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