An investigation of submerged air inlets on a 1/4-scale model of a typical fighter-type airplane

Delany, Noel K.
naca-rm-a8a20
1948


Wind-tunnel tests were made of submerged air inlets on the fuselage of a 1/4-scale model of a typical fighter-type airplane. The results are presented for ramp plan forms with parallel and diverging walls, and show the effects on the ram recovery ratio and predicted critical Mach number of the duct entrance location (forward of the wing and over the wing), internal ducting efficiency, angle of attack, and the use of deflectors. Drag increments of the inlets are presented for the forward location.

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