Template:Thrust engine efficiency

Specific impulse and effective exhaust velocity numbers for a few larger rocket engines.
Engine type Example Use Specific impulse (s) Effective exhaust velocity (m/s)
NK-33 rocket engine Vacuum 331[1] 3,240
SSME rocket engine Space shuttle vacuum 453[2] 4,423
Ramjet Mach 1 800 7,877
J-58 turbojet SR-71 at Mach 3.2 (Wet) 1,900 18,587
Rolls-Royce/Snecma Olympus 593 Concorde Mach 2 cruise (Dry) 3,012 29,553
CF6-80C2B1F turbofan Boeing 747-400 cruise 5,950 58,400
General Electric CF6 turbofan Sea level 11,700 115,000

References