Three-armed frame made of steel tubes, in which three Le Rhone of 120 hp. each, are mounted. Engines drive two 20-ft. propellers revolving in opposite directions at about 600 r.p.m. Record of lift and stability tests.
The Karman-Petroczy helicopter
Aeronautics
Aeronautics ; 20 , n 395
1921
2 Figs.
Aufsatz (Zeitschrift)
Englisch
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