Aeon R
Aeon R is Relativity Space's reusable sea-level LOX/methane rocket engine for Terran R's first stage. Relativity's current Terran R reference lists a high-pressure gas-generator cycle and 269,000 lbf (about 1,196.6 kN) of sea-level thrust per engine; the engine is designed for qualification and reuse. This record describes the engine model, not the Terran R installation.
Identity
- Domains
- spaceflight
- Identity Level
- model
- Kind
- liquid-rocket-engine
- Name
- Aeon R
- Status
- development
Details
- Description
- Aeon R is Relativity Space's reusable sea-level LOX/methane rocket engine for Terran R's first stage. Relativity's current Terran R reference lists a high-pressure gas-generator cycle and 269,000 lbf (about 1,196.6 kN) of sea-level thrust per engine; the engine is designed for qualification and reuse. This record describes the engine model, not the Terran R installation.
- Developers
- Family
- Lineage
- Note
- Relativity documents Aeon R as building on architecture and experience from the smaller Aeon 1.
- Related Propulsion System
- Relationship
- technology-derived-from
- Sources
- Accessed Date
- 2026-07-29
- Publisher
- Relativity Space
- Title
- Updated Terran R and Aeon R architecture
- Manufacturers
- Propellants
- liquid methaneliquid oxygen
- Rocket Specs
- Cycle
- gas-generator
- Sea Level Thrust Kn
- 1196.572
Links
- Official Url
- https://www.relativityspace.com/terran-r/
Assets & Meta
- Creation Time
- July 29, 2026 at 08:05:08 UTC
- Updated Time
- August 21, 2026 at 16:43:40 UTC
Other
- Sources
- Accessed Date
- 2026-08-21
- Note
- Relativity's current Terran R reference identifies Aeon R as the first-stage engine, using a high-pressure gas-generator cycle and producing 269,000 lbf of sea-level thrust per engine; it also says the engine went from design to qualification in 14 months.
- Publisher
- Relativity Space
- Title
- Terran R
- Accessed Date
- 2026-08-21
- Note
- Relativity's 2025 program update identifies thirteen 3D-printed Aeon R engines on Terran R's first stage, reports 269,000 lb of sea-level thrust per engine, and describes flight-intent testing and qualification work.
- Publisher
- Relativity Space
- Title
- Relativity Space Achieves Major Design and Production Milestones for Terran R, Demonstrating Momentum Towards Launch
- Accessed Date
- 2026-08-21
- Note
- Relativity's architecture announcement describes Aeon R as a 3D-printed LOX/methane engine designed and manufactured in-house, with development heritage from Aeon 1.
- Publisher
- Relativity Space
- Title
- Updated Terran R and Aeon R architecture