Reaction Motors XLR99
E106917
The Reaction Motors XLR99 was a pioneering throttleable, restartable liquid-fuel rocket engine that powered the North American X-15 research aircraft to record-breaking speeds and altitudes during the early space age.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Reaction Motors XLR99 canonical | 3 |
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
liquid-fuel rocket engine
ⓘ
rocket engine ⓘ |
| chamberPressure |
approximately 3.4 MPa
ⓘ
approximately 500 psi ⓘ |
| control | throttle controlled from X-15 cockpit ⓘ |
| coolingMethod | regenerative cooling ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| cycleType | gas-generator cycle ⓘ |
| designation | XLR99-RM-1 ⓘ |
| developmentPeriod | 1950s ⓘ |
| era | early space age ⓘ |
| firstFlightUse |
North American X-15
ⓘ
surface form:
X-15 flight program
|
| fuel | anhydrous ammonia ⓘ |
| gimbalCapability | gimballed for thrust vector control ⓘ |
| heritage | influenced later man-rated rocket engine designs ⓘ |
| ignitionSystem | hypergolic igniter fluid ⓘ |
| manufacturer | Reaction Motors Inc. ⓘ |
| notableFeature |
designed for high reliability in crewed flight
ⓘ
first large throttleable man-rated liquid rocket engine ⓘ restartable in flight ⓘ |
| numberOfCombustionChambers | 1 ⓘ |
| operatedBy | X-15 test pilots ⓘ |
| oxidizer | liquid oxygen ⓘ |
| poweredRecord |
X-15 altitude record above 50 miles
ⓘ
X-15 speed record over Mach 6 ⓘ suborbital spaceflight altitudes for X-15 ⓘ |
| program |
North American X-15
ⓘ
surface form:
X-15 program
|
| propellantFeed | turbopump-fed ⓘ |
| propellantType | liquid propellant ⓘ |
| restartable | true ⓘ |
| specificImpulseSeaLevel | about 250 s ⓘ |
| specificImpulseVacuum | about 279 s ⓘ |
| status | retired ⓘ |
| throttleable | true ⓘ |
| thrustRange |
approximately 125 to 254 kN
ⓘ
approximately 28,000 to 57,000 lbf ⓘ |
| thrustVacuum |
about 254 kN
ⓘ
about 57,000 lbf ⓘ |
| usedBy |
NASA
ⓘ
United States Air Force ⓘ |
| usedFor |
X-15 high-altitude research
ⓘ
X-15 high-speed research ⓘ aeronautical research ⓘ early spaceflight research ⓘ |
| usedIn |
hypersonic flight research
ⓘ
pilot physiology research at extreme altitudes ⓘ reentry heating studies ⓘ |
| usedOn | North American X-15 ⓘ |
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.