WIND-TUNNEL INVESTIGATION AT LOW SPEEDS TO DETERMINE THE EFFECT OF ASPECT RATIO AND END PLATES ON A RECTANGULAR WING WITH JET FLAPS DEFLECTED 85°

摘要

The results indicated that the lift coefficient induced by the jet sheet lift coefficient minus jet reaction in the lift direction increased rapidly with increased aspect ratio and had maximum values of 2.9, 6.4 and 10.5 for aspect ratios of 2.8, 5.6, and 8.U, respec­tively. Various end plates increased the effective aspect ratio. The combination of the jet reaction at the trailing edge and the induced lift acting at the O.4-chord station resulted in very large nose-down pitching-moment coefficients about the quarter chord of the wing.