Aeon R engine family
Aeon R is Relativity Space's family of LOX/methane, high-pressure gas-generator-cycle rocket engines for Terran R. The family groups the sea-level Aeon R first-stage model with the vacuum-optimized Aeon V second-stage variant; Relativity's current Terran R page lists 13 Aeon R engines and one Aeon V engine for that vehicle. This family record describes the propulsion family rather than a vehicle installation.
Identity
- Domains
- spaceflight
- Identity Level
- family
- Kind
- liquid-rocket-engine
- Name
- Aeon R engine family
- Status
- development
Details
- Description
- Aeon R is Relativity Space's family of LOX/methane, high-pressure gas-generator-cycle rocket engines for Terran R. The family groups the sea-level Aeon R first-stage model with the vacuum-optimized Aeon V second-stage variant; Relativity's current Terran R page lists 13 Aeon R engines and one Aeon V engine for that vehicle. This family record describes the propulsion family rather than a vehicle installation.
- Developers
- Manufacturers
- Propellants
- liquid methaneliquid oxygen
Links
- Official Url
- https://www.relativityspace.com/terran-r/
Assets & Meta
- Creation Time
- July 29, 2026 at 08:05:11 UTC
- Updated Time
- August 21, 2026 at 16:42:05 UTC
Other
- Sources
- Accessed Date
- 2026-08-21
- Note
- Relativity's current Terran R reference identifies the family roles: thirteen Aeon R engines on the first stage and one vacuum-optimized Aeon V engine on the second stage, both using LOX-methane and a high-pressure gas-generator cycle.
- Publisher
- Relativity Space
- Title
- Terran R
- Accessed Date
- 2026-08-21
- Note
- Relativity's 2025 program update identifies Aeon R as the first-stage engine, describes its LOX-methane gas-generator cycle and 269,000 lb sea-level thrust, and notes substantial design commonality with the second-stage vacuum engine.
- 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 the Aeon R engine design, in-house development and manufacture, and its heritage from the smaller Aeon 1 engine.
- Publisher
- Relativity Space
- Title
- Updated Terran R and Aeon R architecture