Eugen Sänger was an Austrian aerospace engineer best known for his contributions to lifting body and ramjet technology.
Eugen Sänger
Model of concept Sänger II at Technik Museum Speyer
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