Two classes are (1) helicopter, helicogyre, cyclogiro employing power-driven rotors for sustentation and (2) autogiro and gyroplane using autorotating wings for sustentation; work of Nat Advisory Committee Aeronautics on design of optimum airfoil for rotor.
Choice of airfoils for rotating-wing aircraft
Aeronautical Sciences -- J
Journal of Aeronautical Sciences ; 1 , n 2
1934
3 pages
Article (Journal)
English
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Engineering Index Backfile | 1937
Engineering Index Backfile | 1943