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Full-Scale Wind-Tunnel Investigation of the VZ-5 Four-Propeller Deflected-Slipstream VTOL Airplane

M. P. Fink

Abstract

The investigation was conducted to determine the static stability and control characteristics of the VZ-5 VTOL air-plane over the speed range from hovering to forward flight. Force and moment data were taken over a range of angles of attack of 0 to 15 deg and a range of sideslip of +/-10 deg for flap deflections from 0 to 77 deg. The longitudinal stability and trim characteristics were found to be quite unacceptable and it did not seem that they could be corrected with any reasonable modifications to the airplane.

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Key concepts: Airplane, Propeller, Longitudinal static stability, Wind tunnel, Aerospace engineering, Trim, Range (aeronautics), Marine engineering