INVESTIGATION OF A SEMISPAN TILTING-PROPELLER CONFIGURATION AND EFFECTS OF RATIO OF WING CHORD TO PROPELLER DIAMETER ON SEVERAL SMALL-CHORD TILTING-WING CONFIGURATIONS AT TRANSITION SPEEDS

摘要

An investigation of the effects of changes in the ratio of wing chord to propeller diameter of three tilting-wing and tilting-propeller VTOL models has been conducted in the 17-foot test section of the Langley 300-MPH 7- by 10-foot tunnel. The models had wing-chord—propeller-diameter ratios of 0.333， 0.208, and 0.125 with a single propeller 2.00 feet in diameter located at the wing tips.nThe investigation indicated that reductions in the ratio of wing chord to propeller diameter made small changes in lift, drag, and pitching moment;this indicates that with the small ratios of wing chord to propeller diameter in this investigation these configurations would realize small aerodynamic forces and moments in comparison with those realized from direct propeller thrust.