ESA/ArianeGroup Prometheus
ESA/ArianeGroup Prometheus reusable low-cost LOX/methane liquid-rocket-engine demonstrator. ESA identifies a nominal 1 MN class of variable thrust, reignition capability, and suitability for first- and second-stage applications; this record keeps the Themis technology-demonstration context without asserting a canonical vehicle installation or unsupported sibling hydrogen concept.
Identity
- Aliases
- PrometheusESA PrometheusArianeGroup Prometheus
- Domains
- spaceflight
- Identity Level
- model
- Kind
- liquid-rocket-engine
- Name
- ESA/ArianeGroup Prometheus
- Status
- development
Details
- Description
- ESA/ArianeGroup Prometheus reusable low-cost LOX/methane liquid-rocket-engine demonstrator. ESA identifies a nominal 1 MN class of variable thrust, reignition capability, and suitability for first- and second-stage applications; this record keeps the Themis technology-demonstration context without asserting a canonical vehicle installation or unsupported sibling hydrogen concept.
- Developers
- Manufacturers
- Propellants
- liquid oxygenliquid methane
- Rocket Specs
- Restartable
- Yes
Links
Assets & Meta
- Creation Time
- August 7, 2026 at 22:21:53 UTC
- Updated Time
- August 14, 2026 at 23:12:27 UTC
Other
- Sources
- Accessed Date
- 2026-08-07
- Note
- Official ESA page identifies Prometheus as a low-cost reusable rocket engine, its LOX/liquid-methane propellant pair, and its use in Themis technology demonstration.
- Publisher
- European Space Agency
- Title
- Prometheus
- Accessed Date
- 2026-08-07
- Note
- Official ArianeGroup material establishes Prometheus as an engine demonstrator and preserves the program identity without requiring an aircraft or launcher-family relationship.
- Publisher
- ArianeGroup
- Title
- Prometheus: Demonstrator of Future
- Accessed Date
- 2026-08-14
- Note
- ESA identifies Prometheus as a nominal 1 MN variable-thrust, reignitable LOX/methane engine suitable for first- and second-stage applications.
- Publisher
- European Space Agency
- Title
- Prometheus to power future launchers