Reaction Motors XLR30-RM-2 rocket engine
Reaction Motors' XLR30-RM-2 was a historical liquid rocket engine design that NASA records as the basis considered for the X-15 powerplant before the program selected the XLR99. NASA documents its liquid oxygen/anhydrous-ammonia propellant pair, roughly 50,000-lbf target thrust, and approximately 245 s specific impulse; no flight installation is asserted for this precursor design.
Identity
- Aliases
- XLR30-RM-2XLR-30-RM-2XLR30
- Domains
- aviationspaceflight
- Identity Level
- variant
- Kind
- liquid-rocket-engine
- Name
- Reaction Motors XLR30-RM-2 rocket engine
- Status
- historical
Details
- Description
- Reaction Motors' XLR30-RM-2 was a historical liquid rocket engine design that NASA records as the basis considered for the X-15 powerplant before the program selected the XLR99. NASA documents its liquid oxygen/anhydrous-ammonia propellant pair, roughly 50,000-lbf target thrust, and approximately 245 s specific impulse; no flight installation is asserted for this precursor design.
- Lineage
- Note
- NASA identifies the XLR30 as the more powerful Super Viking derivative of the XLR10 Viking engine; this edge captures the historical design lineage without asserting a flight installation for XLR30-RM-2.
- Related Propulsion System
- Relationship
- direct-derivative-of
- Sources
- Accessed Date
- 2026-08-14
- Publisher
- NASA
- Title
- X-15: Extending the Frontiers of Flight
- Accessed Date
- 2026-08-14
- Publisher
- NASA Technical Reports Server
- Title
- Hypersonics Before the Shuttle
- Propellants
- liquid oxygenanhydrous ammonia
Links
Assets & Meta
- Creation Time
- August 15, 2026 at 03:32:05 UTC
- Updated Time
- August 15, 2026 at 03:36:00 UTC
Other
- Sources
- Accessed Date
- 2026-08-14
- Note
- NASA's X-15 history identifies the exact XLR30-RM-2 designation as the engine basis considered for the X-15 and documents its liquid-oxygen/anhydrous-ammonia propellant pair and approximately 245 s specific impulse.
- Publisher
- NASA
- Title
- X-15: Extending the Frontiers of Flight
- Accessed Date
- 2026-08-14
- Note
- NASA's aerospace-history monograph records the XLR30-RM-2 as the design basis considered for the X-15 powerplant and distinguishes it from the later XLR99 selection.
- Publisher
- NASA Technical Reports Server
- Title
- Hypersonics Before the Shuttle