Fred H. Goelzer, Edgar M. Cortright, Jr.
Experimental investigation was conducted at Mach number 1.88 to determine performance characteristics of half a 50 degree-conical-spike inlet mounted on a flat plate. Initial boundary layer was removed up-stream of inlet by a ram-type scoop of variable height. Initial boundary-layer thickness was also varied. With complete removal of initial boundary layer, total-pressure recovery of approximately 70 percent. Several alternative boundary- layer-removal systems were investigated which decreased the adverse effect of operating the ram scoop sub-critically.
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