Transonic free-flight investigation of the total drag and of the component drags (cowl pressure, additive, base, friction, and internal) encountered by a 16-inch-diameter ram-jet engine for Mach numbers from 0.80 to 1.43

Wesley E. Messing, Leonard Rabb
naca-rm-e52f02
Aug 1952


A free-flight investigation of the drag on four full-scale models of 16-inch-diameter ram-jet engines was conducted. For each model, the total, base, internal, and external drag were evaluated. Data obtained from one model were sufficient that the constituents of the external drag, namely, cowl pressure, additive, and friction drags, could be evaluated for a Mach number range from 0.80 to 1.43 and mass-flow ratio from 0.66 to 0.84.

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