Typical Values of SFC For Thrust Engines
| Engine type | Scenario | SFC in lb/(lbf·h) | SFC in g/(kN·s) | Specific impulse (s) | Effective exhaust velocity (m/s) |
|---|---|---|---|---|---|
| NK-33 rocket engine | Vacuum | 10.9 | 309 | 331 | 3,240 |
| SSME rocket engine | Space shuttle vacuum | 7.95 | 225 | 453 | 4,423 |
| Ramjet | Mach 1 | 4.5 | 127 | 800 | 7,877 |
| J-58 turbojet | SR-71 at Mach 3.2 (Wet) | 1.9 | 53.8 | 1,900 | 18,587 |
| Rolls-Royce/Snecma Olympus 593 | Concorde Mach 2 cruise (Dry) | 1.195 | 33.8 | 3,012 | 29,553 |
| CF6-80C2B1F turbofan | Boeing 747-400 cruise | 0.605 | 17.1 | 5,950 | 58,400 |
| General Electric CF6 turbofan | Sea level | 0.307 | 8.696 | 11,700 | 115,000 |
Read more about this topic: Thrust Specific Fuel Consumption
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