Did Concorde use turbojets or turbofans?
For optimum supersonic flight, turbofan engines were considered, but then rejected, this was due to their large master cross-section which would cause excessive drag. Turbojets were found to be the best choice of engines for Concorde. Powered by four Rolls-Royce/Snecma Olympus 593 turbojet engines, the Concorde first took its place on the world stage in 1969 when it traveled twice the speed of sound (Mach 2.