RL10C-X
L3Harris/Aerojet Rocketdyne RL10C-X cryogenic expander-cycle upper-stage engine being qualified for Vulcan Centaur. The model adds a 3D-printed combustion chamber and larger lightweight composite nozzle over RL10C-1-1, with published 24,120 lbf (107.3 kN) thrust and 460.9 s specific impulse on liquid hydrogen/liquid oxygen; lifecycle remains development pending qualification and operational flight evidence.
Identity
- Domains
- spaceflight
- Identity Level
- variant
- Kind
- liquid-rocket-engine
- Name
- RL10C-X
- Status
- development
Details
- Description
- L3Harris/Aerojet Rocketdyne RL10C-X cryogenic expander-cycle upper-stage engine being qualified for Vulcan Centaur. The model adds a 3D-printed combustion chamber and larger lightweight composite nozzle over RL10C-1-1, with published 24,120 lbf (107.3 kN) thrust and 460.9 s specific impulse on liquid hydrogen/liquid oxygen; lifecycle remains development pending qualification and operational flight evidence.
- Family
- Propellants
- liquid hydrogenliquid oxygen
- Rocket Specs
- Cycle
- expander
- Vacuum Specific Impulse S
- 460.9
- Vacuum Thrust Kn
- 107.3
Links
Assets & Meta
- Creation Time
- August 15, 2026 at 04:15:58 UTC
- Updated Time
- August 15, 2026 at 04:15:58 UTC
Other
- Sources
- Accessed Date
- 2026-08-14
- Publisher
- L3Harris
- Title
- RL10 engine models and RL10C-X qualification
- Accessed Date
- 2026-08-14
- Publisher
- L3Harris
- Title
- Vulcan rocket set to debut with Aerojet Rocketdyne propulsion
- Accessed Date
- 2026-08-14
- Publisher
- NASA Technical Reports Server
- Title
- Transformational propulsion: additive RL10C-X elements
- Accessed Date
- 2026-08-14
- Publisher
- L3Harris
- Title
- RL10 propulsion system specification sheet