Coleopter as optimum solution for vertical lift aircraft; technical and economic data on plane with cylindrical wing structure developed in France. See Engineering Index 1955 p 28, under Aircraft -- Takeoff.
Lotrecht startende Flugzeuge
Lotrecht startende Flugzeuge
Verein Deutscher Ingenieure -- VDI Zeitschrift ; 98 , n 19
1956
5 pages
Article (Journal)
German
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