The optimum powerplant for a Mach 2.2 transport aircraft is a turbojet. The Olympus 593, latest of a well proven family of twin-spool, axial-flow turbojets, has been designed especially for installation in the Concorde. Invaluable development has been achieved from two 90-percent-scale engines and the first seven full-size engines. Satisfactory fuel and oils are now available for Concorde, and the powerplant has already flown in a Vulcan flying test bed.

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