Wind-Tunnel Tests of a 1/5-Scale Model of the Republic XP-84 Airplane (Army Project MX-578). II - Lateral Stability and Control
NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS LANGLEY FIELD United States
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At the request of the Air Technical Service Command, Army Air Forces, a 15-scale powered model of the Republic XP-84 airplane was tested in the Langley 7- by 10-foot tunnel. The results of the lateral stability and control investigation are presented in the present report. On the basis of low-speed wind-tunnel data, the model is directionally stable at all lift coefficients in the cruising and landing configurations. It has positive effective dihedral for all conditions tested except at the stall. The application of power or the external modification of the jet exit nozzle have little effect on the directional stability and effective dihedral. Rudder lock did net occur on the model for any condition tested. The directional control is satisfactory, and the aileron effectiveness with a limit of 30 pounds stick force will probably be satisfactory up to at least 500 miles per hour at sea level, according to the estimation from low-speed data, with no corrections for compressibility effects.
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- Attack and Fighter Aircraft