Use of gliders for sport and also for purpose of scientific research is discussed; comparison with bird flight; opinions of C. Lougheed considered; it has been shown in Germany that serious gliding experiments, especially in study of gliding angles, can be made with help of ordinary airplane.
On motorless flying
Aeroplane
Aeroplane ; 37 , n 19
1929
9 Figs
Article (Journal)
English
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