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Weltensegler G.m.b.H. was a German aircraft company formed by Friedrich Wenk, who became its Technical Director.〔Lippisch, A.; ''The Delta Wing: History and Development'', Iowa State University 1981, pages 2-4.〕 Wenk developed tailless gliders and entered one in the 1921 Rhön gliding competition held at the Wasserkuppe, from 8 August to 25 August 1921.〔〔Hoff, Wilhelm. “Technical memorandum No. 100, Rhön Soaring Flight Competition, 1921”. National Advisory Committee for Aeronautics. Washington D.C.. June 1922.〕 The designer Alexander Lippisch was an employee.〔 ==History== Friedrich Wenk had experimented with model gliders since his teen-age years and discovered that tailless gliders would fly with swept back wings and forward centres of gravity. Stabilising moments in Wenk's designs were provided by swept back wing-tips set with negative incidence relative to the rest of the main-plane.〔 After limited success, Wenk was fortunate enough to secure financial backing, allowing him to form Weltensegler G.m.b.H. to design and build his designs.〔 In 1921 Weltensegler entered a glider in the Rhön competition. That same spring, Lippisch designed the ''Falke'', a low-wing monoplane which was structurally unsound. The wing was removed and tested as a hang glider, before being enlarged and, in the winter of 1921-22, incorporated in the ''Alexander'' training glider.〔 1923 saw Fritz Stemen design another training glider the ''Bremen'', with Lippisch designing its wing. Lippisch also designed another trainer, ''Djävlar Annamar'', which was a braced monoplane. The Steinmann Company would later build an improved version.〔 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「Weltensegler」の詳細全文を読む スポンサード リンク
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