Synonyms were used for: Hubschrauber
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    The problem of the helicopter

    Warner, Edward P. | Engineering Index Backfile | 1920
    Keywords: Helicopters

    Model tests on the economy and effectiveness of helicopter propellers

    Munk, M.M. | Engineering Index Backfile | 1925
    Keywords: Helicopters

    Aerodynamic analysis of gyroplane rotating-wing system

    Wheatley, J.B. | Engineering Index Backfile | 1934
    Keywords: Gyroplanes

    Kay gyroplane -- Type 331

    Engineering Index Backfile | 1934
    Keywords: Gyroplanes

    Wind-tunnel tests of 10-foot-diameter gyroplane rotor

    Wheatley, J.B. / Bioletti, C. | Engineering Index Backfile | 1935
    Keywords: Gyroplanes

    Gyroplane -- Its principles and its possibilities

    Breguet, L. | Engineering Index Backfile | 1937
    Keywords: Gyroplanes

    Hafner gyroplane

    Engineering Index Backfile | 1937
    Keywords: Gyroplanes

    Hafner gyroplane

    Engineering Index Backfile | 1937
    Keywords: Gyroplanes

    Real helicopter progress

    Poulsen, C.M. | Engineering Index Backfile | 1939
    Keywords: Helicopters

    Dynamic stability of helicopter with hinged rotor blades

    Engineering Index Backfile | 1939
    Keywords: Helicopters

    Contribution to aerodynamics of rotating wing aircraft

    Sissingh, G. | Engineering Index Backfile | 1941
    Keywords: Gyroplanes

    Basic drives for helicopters

    Pecker, J.S. | Engineering Index Backfile | 1944
    Keywords: Helicopters

    Static-thrust tests of six rotor-blade designs on helicopter in Langley full-scale tunnel

    Dingeldein, R.C. / Schaefer, R.F. | Engineering Index Backfile | 1945
    Keywords: Helicopters

    Overlapping rotors distinguish XR-8

    Engineering Index Backfile | 1945
    Keywords: Helicopters

    Charts for helicopter-performance estimation

    Talkin, H.W. | Engineering Index Backfile | 1945
    Keywords: Helicopters

    Evaluation of induced-velocity field of idealized helicopter rotor

    Coleman, R.P. / Feingold, A.M. / Stempin, C.W. | Engineering Index Backfile | 1945
    Keywords: Helicopters

    Helicopter landing technique

    Hosegood, C.T.D. | Engineering Index Backfile | 1946
    Keywords: Helicopters

    Stalling of helicopter blades

    Gustafson, F.B. / Myers, Jr., G.C. | Engineering Index Backfile | 1946
    Keywords: Helicopters