RS-68A
The uprated RS-68 variant that powered the final Delta IV configurations.
Identity
- Domains
- spaceflight
- Identity Level
- variant
- Kind
- liquid-rocket-engine
- Name
- RS-68A
- Status
- retired
Details
- Description
- The uprated RS-68 variant that powered the final Delta IV configurations.
- Family
- Lineage
- Note
- ULA identifies RS-68A as an upgrade of the original RS-68 for higher Delta IV Heavy performance.
- Related Propulsion System
- Relationship
- direct-derivative-of
- Sources
- Nested value
- Propellants
- liquid hydrogenliquid oxygen
- Rocket Specs
- Chamber Count
- 1
- Cycle
- gas generator
- Sea Level Thrust Kn
- 3,137
- Vacuum Specific Impulse S
- 411.9
Links
Assets & Meta
- Creation Time
- July 29, 2026 at 09:31:33 UTC
- Updated Time
- July 29, 2026 at 09:32:28 UTC
Other
- Sources
- Accessed Date
- 2026-07-29
- Publisher
- United Launch Alliance
- Title
- Final Delta IV Heavy launch
- Accessed Date
- 2026-07-29
- Publisher
- United Launch Alliance
- Title
- First RS-68A hot-fire engine test
- Accessed Date
- 2026-07-29
- Publisher
- United Launch Alliance
- Title
- Delta IV Launch Services User's Guide