Jet engine Consumption of fuel or propellant Specific fuel consumption (SFC), specific impulse, and effective exhaust velocity numbers for various rocket and jet 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 | 3240 |
| SSME rocket engine | Space shuttle vacuum | 7.95 | 225 | 453 | 4423 |
| Ramjet | Mach 1 | 4.5 | 127 | 800 | 7877 |
| J-58 turbojet | SR-71 at Mach 3.2 (Wet) | 1.9 | 53.8 | 1900 | 18587 |
| Rolls-Royce/Snecma Olympus 593 | Concorde Mach 2 cruise (Dry) | 1.195 | 33.8 | 3012 | 29553 |
| CF6-80C2B1F turbofan | Boeing 747-400 cruise | 0.605 | 17.1 | 5950 | 58400 |