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Schempp-Hirth Discus
The Schempp-Hirth Discus is a Standard Class glider designed by Schempp-Hirth. It was produced in Germany between 1984 and 1995 but has continued in production in the Czech Republic. It replaced the Standard Cirrus. It was designed by Klaus Holighaus.
==Design and development==
The Discus was the first production sailplane to have a distinctive swept-back leading edge. This is now common in contemporary sailplanes.
Studies had long shown that the ideal wing for minimizing induced drag should be an elliptic planform. To keep production costs down, a triple-trapezoidal approximation of this shape was adopted for the Discus. The wing section was also new. Winglets were only available towards the end of the production run, though many have been retro-fitted. The fuselage and tail were adapted from the Schempp-Hirth Ventus. A version with a narrow fuselage is called the Discus 'a' and the wider fuselage version is called the 'b'. The fuselage is made of glass-reinforced plastic around a steel tube frame. The wings and tail surfaces are also fiberglass with the exception of the main wing spar, which is made of carbon fiber. There is a water ballast tank in the fin for trimming purposes when the main wing mounted ballast tanks are in use (184L combined) for a maximum wing-loading of
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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