#ThrowbackThursday 1950s | Mach Meter Design (1953-1958) With the - TopicsExpress

#ThrowbackThursday 1950s | Mach Meter Design (1953-1958) With the advent of the Century series (F-100 to F-106) aircraft, Mach 1+ speeds adversely affected the accuracy of conventional airspeed indicators. AFOSR-funded research programs at several institutions (Princeton University (co-funded with Office of Naval Research), Cornell University and the Aerospace Research Laboratory), solved the problem through research on the interaction between shock waves created by supersonic flight and the boundary layer of air that formed between the surface of the aircraft and the free air stream flowing past the aircraft. A blunt body shape placed in the flow field ahead of the fuselage results in a more accurate airspeed indication. The Aeronautical Research Laboratories designed Mach meter indicators using this principle were employed on the Century series, as well as the YF12A—later designated as the SR-71. #AirForce #BasicResearch #tbt

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