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Presented are lift, drag, and pitching-moment data, neutral points, and the effects of power, flap deflection, and free elevator for the model at zero angle of yaw. The lateral-stability parameters and tests for a yaw range including rudder-free data are also presented.
The results of wind-tunnel of a single-engine single-rotation airplane model indicated that, although extreme asymmetry in the horizontal tail showed a reduction in power effects on the longitudinal stability of the model, the particular "practical" arrangement tested did not show marked improvement. Disagreement between tests and analyses indicated the necessity for continued research to determine the characteristics of the slipstream behind various propeller-fuselage-wing combinations. Out-of-trim lateral forces and moments of the unsymmetrical tail arrangements that were best from consideration of longitudinal stability were no greater than those of the normal tail arrangement.
An investigation was conducted in the Langley high-speed 7- by 10-foot tunnel to determine the horizontal- and vertical-tail contributions to the static lateral stability of a complete-model swept-wing configuration at high subsonic speeds. The results indicate that, in a general, Mach number effects within the range studied and wing effects on the tail contribution were small and the overall trends of the data of the present investigation agreed with those which have been established at low speeds.