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    VIBRATION REDUCTION IN ROTORCRAFT USING CLOSED-LOOP ACTIVE FLOW CONTROL

    Patterson, R. / Friedmann, P. | British Library Conference Proceedings | 2021

    AEROMECHANICAL BEHAVIOR AND AEROELASTIC STABILITY OF COAXIAL ROTORS IN HOVER AND FORWARD FLIGHT

    Singh, P. / Friedmann, P. | British Library Conference Proceedings | 2020

    Announcements, Comments, and Acknowledgments

    Friedmann, P P | Online Contents | 2013

    Worm gears for automotive vehicles

    Friedmann, P. | Engineering Index Backfile | 1928

    The Maybach chassis with 7-liter engine

    Friedmann, P. | Engineering Index Backfile | 1926

    3 or 4 wheels

    Friedmann, P. | Engineering Index Backfile | 1931

    Germany. Building of automobile bodies in Germany in 1928

    Friedmann, P. | Engineering Index Backfile | 1928

    The world's automobile industry

    Friedmann, P. | Engineering Index Backfile | 1928