R-4D-11
The R-4D-11 is the 110-lbf-class, 490 N, 315 s variant of the L3Harris R-4D bipropellant spacecraft-thruster family. NASA and ESA identify eight Aerojet-built R-4D-11 auxiliary thrusters on the Orion European Service Module for crewed Orion maneuvering, course corrections, and backup propulsion; the canonical Orion vehicle-family configuration is linked here.
Identity
- Aliases
- Aerojet R-4D-11R-4D-11 auxiliary engine
- Domains
- spaceflight
- Identity Level
- variant
- Kind
- chemical-thruster
- Name
- R-4D-11
- Status
- active
Details
- Description
- The R-4D-11 is the 110-lbf-class, 490 N, 315 s variant of the L3Harris R-4D bipropellant spacecraft-thruster family. NASA and ESA identify eight Aerojet-built R-4D-11 auxiliary thrusters on the Orion European Service Module for crewed Orion maneuvering, course corrections, and backup propulsion; the canonical Orion vehicle-family configuration is linked here.
- Family
- Manufacturers
- Propellants
- monomethylhydrazine (MMH)nitrogen tetroxide (NTO)
- Rocket Specs
- Vacuum Specific Impulse
- …
- Vacuum Thrust
- …
Assets & Meta
- Creation Time
- August 15, 2026 at 05:10:15 UTC
- Updated Time
- August 20, 2026 at 23:05:00 UTC
Other
- Sources
- Accessed Date
- 2026-08-14
- Note
- Current mission material identifies L3Harris R-4D-11 thrusters on Orion for course corrections and maneuvers.
- Publisher
- L3Harris Technologies
- Title
- Artemis II
- Accessed Date
- 2026-08-14
- Note
- Current Orion material describes eight bipropellant engines based on the flight-proven R4D family mounted on the European Service Module.
- Publisher
- L3Harris Technologies
- Title
- Orion
- Accessed Date
- 2026-08-14
- Note
- NASA technical paper gives the R-4D-11 490 N/315 s configuration.
- Published Date
- 2020-07-01
- Publisher
- NASA
- Title
- Development of Concept Illustration Variants of the JUMP Lander
- Accessed Date
- 2026-08-04
- Note
- NASA identifies eight R-4D-11 auxiliary engines built by Aerojet Rocketdyne on the Orion service module, in four sets of two, using MMH/MON for trajectory corrections and backup propulsion.
- Publisher
- NASA
- Title
- Fired Up: Engines and Motors Put Artemis Mission in Motion
- Accessed Date
- 2026-08-04
- Note
- NASA identifies Orion as the crew spacecraft for Artemis deep-space missions, establishing the installation global significance and vehicle context.
- Publisher
- NASA
- Title
- Orion Overview
- Accessed Date
- 2026-08-20
- Note
- ESA identifies eight 490-N auxiliary engines on the Orion European Service Module as Aerojet R-4D-11 thrusters.
- Publisher
- European Space Agency
- Title
- European Service Module Propulsion