Any one endeavoring to solve the problem of soaring flight is confronted not only by structural difficulties, but also by the often far more difficult aerodynamic problem of flight properties and efficiency, which can only be determined by experimenting with the finished glider.
Problem of glider models
1922-09-01
Miscellaneous
No indication
English
Automatic unfolding hang glider of air-drop glider and air-drop glider
European Patent Office | 2024
|Online Contents | 1999