FORCE-TEST INVESTIGATION OF A 1/4-SCALE MODEL OF THE MODIFIED VZ-2 AIRCRAFT

摘要

A force-test investigation has been conducted to determine the longitu¬dinal aerodynamic characteristics and the aileron control effectiveness of a 1/%-scale model of the modified VZ-2 tilt-wing vertical-take-off-and-landing aircraft equipped with a full-span slotted flap. The model was also tested over the transition range with a leading-edge droop modification.nThe results of the force tests indicated that the use of full-span slotted flaps produced sizable increases in lift which resulted in considerable reduc¬tions in the wing incidence angles required throughout the transition range;and these reductions in wing incidence were very beneficial in reducing wing stal¬ling in the transition range. The use of leading-edge droop had no appreciable effect on the static longitudinal characteristics. The use of full-span aile¬rons as a yaw control for hovering and low-speed transition flight appears to offer considerable promise;however, the phasing in of some roll producing con¬trol is necessary fairly early in the transition to eliminate the adverse roll that is encountered.