The Boeing CIM-10 Bomarc was a supersonic ramjet powered long-range surface-to-air missile (SAM) used during the Cold War for the air defense of North America. In addition to being the first operational long-range SAM and the first operational pulse doppler aviation radar, it was the only SAM deployed by the United States Air Force.
A Bomarc missile begins its "climb phase" of launch. The midcourse phase and homing dive used ramjets.
October 1960, BOMARCs in New Jersey (BOMARC Site No. 1)
A CQM-10B drone launched at Vandenberg Air Force Base, 1977.
Bomarc B on display at the Canada Aviation and Space Museum Ottawa, Ontario, Canada, c. 2006.
A ramjet is a form of airbreathing jet engine that requires forward motion of the engine to provide air for combustion. Ramjets work most efficiently at supersonic speeds around Mach 3 and can operate up to Mach 6.
An AQM-60 Kingfisher, the first production ramjet to enter service with the US military
Upper engine is a ramjet on the Bloodhound missile
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Bristol Thor ramjet modified for display purposes. Two Thor engines were used on the Bristol Bloodhound missile