INVESTIGATION OF EFFECTIVENESS OF A WING EQUIPPED WITH A 50-PERCENT-CHORD SLIDING FLAP, A 30-PERCENTVCHORD SLOTTED FLAP, AND A 30-PERCENT-CHORD SLAT TN DEFLECTING PROPELLER SLIPSTREAMS DOWNWARD FOR VERTICAL TAKE-OFF

摘要

An investigation of the effectiveness of a wing equipped with a 50-percent-chord sliding flap, a 30-percent-chord slotted flap, and a 30-percent-chord slat in deflecting propeller slipstreams downward for ver¬tical take-off and landing has been conducted in a static-thrust facility at the Langley Aeronautical Laboratory.nThe results indicate that with proper settings of the flaps and slat a turning angle of about 70° was obtained both in and out of the ground-effect region, but the ratio of resultant force to thrust varied from about 1.00 with the model in the position nearest the ground to about 0.86 out of the ground-effect region. With the slat installed, the model could be trimmed in pitch with the center of gravity located at 42 percent chord.