Results of recent wind-tunnel pressure-distribution tests on a large-scale boundary-layer-control model with a 49° sweptback wing have indicated that blowing air at low blowing rates over highly deflected trailing-edge flaps does not produce any unusual flap-load or wing-load problems at low speed. Blowing at very high momentum rates> however, produces large increases in flap loads and extremely high local negative pressures over the flap leading edge.
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