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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
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