Accession Number : AD0284192

Title :   WIND-TUNNEL INVESTIGATION OF DTMB RECTANGULAR PLANFORM GEM MODEL 472,

Corporate Author : DAVID TAYLOR MODEL BASIN WASHINGTON D C

Personal Author(s) : BURGAN,ELMER T.

Report Date : MAY 1962

Pagination or Media Count : 35

Abstract : Aerodynamic characteristics of a rectangular planform GEM model in pitch and sideslip at various height parameters are presented for a range from near hovering to high speeds. The model is longitudinally stable throughout the speed range except at the lowest ground height at high speed. The model is directionally unstable at all heights and speeds. The lift and drag of the model due to the external flow field alone are presented. A separate propulsive device was assumed for computing purposes to determine the power required and the equivalent lift-to-drag ratio of the model. No other aerodynamic effects of the propulsion device were assumed in computing the data. (Author)

Descriptors :   *FLYING PLATFORMS, AERODYNAMIC CHARACTERISTICS, CONFIGURATION, CONTROL SURFACES, CONTROL SYSTEMS, DEFLECTION, DESIGN, DRAG, EXHAUST NOZZLES, GROUND EFFECT MACHINES, HOVERING, LIFT, MODEL TESTS, PITCH (MATERIAL), PITCH (MOTION), ROLL, WIND TUNNEL MODELS, YAW

Distribution Statement : APPROVED FOR PUBLIC RELEASE