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The RS-25, also known as the Space Shuttle Main Engine (SSME), is a liquid-fuel cryogenic rocket engine that was used on NASA's Space Shuttle and is used on the Space Launch System.
History, Applications & Measurement
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engine engines space main fuel system oxidizer shuttle nozzle thrust launch chamber used power first combustion use liquid seconds rocketdyne
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| RS-25 | Associated LV | Space Shuttle | 1.00 | infobox |
| RS-25 | Associated LV | Space Launch System | 1.00 | infobox |
| RS-25 | Chamber pressure | 2,994 psi (20.64 MPa) | 1.00 | infobox |
| RS-25 | Country of origin | United States | 1.00 | infobox |
| RS-25 | Cycle | Fuel-rich dual-shaft staged combustion | 1.00 | infobox |
| RS-25 | Designer | Rocketdyne | 1.00 | infobox |
| RS-25 | Diameter | 2.4 m (96 in) | 1.00 | infobox |
| RS-25 | Dry mass | 3,177 kg (7,004 lb) | 1.00 | infobox |
| RS-25 | First flight | April 12, 1981 (1981-04-12) (STS-1) | 1.00 | infobox |
| RS-25 | Length | 4.3 m (168 in) | 1.00 | infobox |
| RS-25 | Manufacturer | Rocketdyne (1972–2005) | 1.00 | infobox |
| RS-25 | Manufacturer | Pratt & Whitney Rocketdyne (2005–2013) | 1.00 | infobox |
| RS-25 | Manufacturer | Aerojet Rocketdyne (2013–present) | 1.00 | infobox |
| RS-25 | Mass flow | 514.49 kg/s (1,134.26 lb/s) | 1.00 | infobox |
| RS-25 | Mixture ratio | 6.03:1 | 1.00 | infobox |
| RS-25 | Notes | Data is for RS-25D at 109% of rated power level. | 1.00 | infobox |
| RS-25 | Nozzle ratio | 78:1 | 1.00 | infobox |
| RS-25 | Predecessor | HG-3 | 1.00 | infobox |
| RS-25 | Propellant | LOX / .mw-parser-output .template-chem2-su{display:inline-block;font-size:80%;line-height:1;vertical-align:-0.35em}.mw-parser-output .template-chem2-su>span{display:block;text-a… | 1.00 | infobox |
| RS-25 | Specific impulse, sea-level | 366 s (3.59 km/s) | 1.00 | infobox |
| RS-25 | Specific impulse, vacuum | 452.3 s (4.436 km/s) | 1.00 | infobox |
| RS-25 | Status | In use | 1.00 | infobox |
| RS-25 | Throttle range | 67–109% | 1.00 | infobox |
| RS-25 | Thrust, sea-level | 1,860 kN (418,000 lbf) | 1.00 | infobox |
| RS-25 | Thrust, vacuum | 2,279 kN (512,300 lbf) | 1.00 | infobox |
| RS-25 | Thrust-to-weight ratio | 73.1 | 1.00 | infobox |
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