Aerojet MR-104G
The Aerojet/L3Harris MR-104G is the Orion crew-module variant of the MR-104 hydrazine monopropellant reaction-control thruster family. Orion flies twelve MR-104G engines for crew-module reaction control; NASA's Orion propulsion work identifies the required scarfed-mode modification, while current Artemis material confirms the designation and in-service use.
Identity
- Aliases
- MR-104GAerojet MR-104GAerojet Rocketdyne MR-104G
- Domains
- spaceflight
- Identity Level
- variant
- Kind
- chemical-thruster
- Name
- Aerojet MR-104G
- Status
- active
Details
- Description
- The Aerojet/L3Harris MR-104G is the Orion crew-module variant of the MR-104 hydrazine monopropellant reaction-control thruster family. Orion flies twelve MR-104G engines for crew-module reaction control; NASA's Orion propulsion work identifies the required scarfed-mode modification, while current Artemis material confirms the designation and in-service use.
- Family
- Manufacturers
- Propellants
- hydrazine (N2H4)
Links
Assets & Meta
- Creation Time
- August 6, 2026 at 20:41:47 UTC
- Updated Time
- August 15, 2026 at 05:16:22 UTC
Other
- Sources
- Accessed Date
- 2026-08-14
- Note
- NASA identifies 12 Aerojet Rocketdyne MR-104G monopropellant reaction-control engines on Orion and their hydrazine propellant.
- Publisher
- NASA
- Title
- Fired Up: Engines and Motors Put Artemis Mission in Motion
- Accessed Date
- 2026-08-14
- Note
- NASA independently identifies twelve MR-104G engines on Orion's crew module and distinguishes them from the service-module engine set.
- Published Date
- 2022-12-09
- Publisher
- NASA
- Title
- Artemis I Flight Day 24: Orion Heads Home
- Accessed Date
- 2026-08-14
- Note
- NASA documents Aerojet MR-104 heritage thrusters for Orion's hydrazine crew-module RCS and notes the scarfed-mode modification.
- Published Date
- 2008-10-01
- Publisher
- NASA
- Title
- NASA Propulsion Investments for the Constellation Program
- Accessed Date
- 2026-08-14
- Note
- Manufacturer mission material lists twelve MR-104 thrusters on the current Orion crew-module propulsion system.
- Published Date
- 2025-12
- Publisher
- L3Harris Technologies
- Title
- Our Role on Artemis II