AJ10 family
AJ10 is Aerojet-General's long-running family of pressure-fed, storable-hypergolic liquid rocket engines, with early AJ10-118 upper-stage applications, the Apollo Service Module's AJ10-137, Shuttle OMS derivatives, and Orion service propulsion. The family-level record uses Aerozine 50 and nitrogen tetroxide as the common propellant pair evidenced by the AJ10-137 and AJ10-118K references; variant-specific thrust, specific impulse, and installation context remain on model records.
Identity
- Aliases
- Aerojet-General AJ10Aerojet AJ10
- Domains
- spaceflight
- Identity Level
- family
- Kind
- liquid-rocket-engine
- Name
- AJ10 family
- Status
- active
Details
- Description
- AJ10 is Aerojet-General's long-running family of pressure-fed, storable-hypergolic liquid rocket engines, with early AJ10-118 upper-stage applications, the Apollo Service Module's AJ10-137, Shuttle OMS derivatives, and Orion service propulsion. The family-level record uses Aerozine 50 and nitrogen tetroxide as the common propellant pair evidenced by the AJ10-137 and AJ10-118K references; variant-specific thrust, specific impulse, and installation context remain on model records.
- Propellants
- Aerozine 50nitrogen tetroxide
Links
Assets & Meta
- Creation Time
- July 29, 2026 at 08:12:16 UTC
- Updated Time
- August 21, 2026 at 17:41:09 UTC
- Image
- Download
Other
- Sources
- Accessed Date
- 2026-08-21
- Note
- NASA technical documentation supports the AJ10 family installation boundary in early Vanguard-era upper-stage propulsion without asserting a more precise model for the family record.
- Publisher
- NASA Technical Reports Server
- Title
- Vanguard Launch Vehicle reference
- Accessed Date
- 2026-08-21
- Note
- NASA documents an AJ10-118E pressure-fed liquid-propellant propulsion system in the Pioneer I / Thor-Able launch-vehicle context, supporting the family-level upper-stage lineage.
- Publisher
- NASA Technical Reports Server
- Title
- Pioneer I and the Thor-Able I launch vehicle
- Accessed Date
- 2026-08-21
- Note
- NASA identifies Aerojet-General as the designer, builder, and tester of the Apollo Service Propulsion System AJ10-137 and records its Aerozine 50 and nitrogen tetroxide hypergolic propellant pair and 20,500 lbf thrust; the rating remains on the AJ10-137 model boundary.
- Publisher
- NASA
- Title
- 60 Years Ago: First Test Firing of the Apollo Service Propulsion System
- Accessed Date
- 2026-08-21
- Note
- NASA documents the AJ10-137 Apollo Service Module engine configuration, including pressure-fed operation, Aerozine 50 and nitrogen tetroxide propellants, and 314.5 s specific impulse; variant-specific performance is not generalized to the family record.
- Publisher
- NASA Technical Reports Server
- Title
- Aerojet - AJ10-137 Apollo Service Module Engine
- Accessed Date
- 2026-08-21
- Note
- NASA identifies the Orion European Service Module propulsion as an AJ10-derived service-propulsion installation and records the later family context without collapsing the Orion engine into the AJ10 family identity.
- Publisher
- NASA
- Title
- Fired Up: Engines and Motors Put Artemis Mission in Motion
- Accessed Date
- 2026-08-21
- Note
- NASA identifies the Delta II second-stage engine as a restartable Aerojet Rocketdyne AJ10-118K using Aerozine 50 and nitrogen tetroxide, supporting the later family application and common propellant pair.
- Publisher
- NASA Science
- Title
- A Reliable Rocket with a Successful Past