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The JS-1 Revelation is a glider built of glass-fibre, carbon fibre and Kevlar. It is available with an 18-metre span for the 18 metre class or a 21-metre span for the Open class. The manufacturer is Jonker Sailplanes of Potchefstroom South Africa, founded in 2004 by two brothers, Attie and Uys Jonker. The structural and chief designer is Attie Jonker, while the airfoil and main aerodynamic features were developed by Johan Bosman in co-operation with the Delft University of Technology. ==18 metre versions== The wing has full-span flaperons, an elliptical planform and uses winglets. It is in 4 pieces, each tip is 1.5 metres. Two novel features are: * a double-hole blowing/suction system in the wings to minimise drag. The two rows of blow holes on the lower surface prevent turbulent flow at specific locations for different flap settings, thus reducing drag * a jet engine for the self-sustaining version. A self-launching version was considered but it was decided that the fuselage would require extensive structural modification. The first flight of the JS-1 was on 12 December 2006. Series production then started and up to July 2012 about 34 had been produced〔(【引用サイトリンク】url=http://www.jonkersailplanes.co.za/specifications.htm ) 〕 Although it has been built to EASA standards, discussions on EASA certification are still continuing (as at July 2012). Attie Jonker won the 18 metre class South African National Championship in 2008 with a JS-1 Revelation. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Jonker JS-1 Revelation」の詳細全文を読む スポンサード リンク
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