YJSP Prometheus
YJSP Prometheus is the Yellow Jacket Space Program’s kerosene/liquid-oxygen ablatively cooled composite rocket engine. Its silica-epoxy thermal liner erodes during firing while a carbon-fibre/epoxy overwrap carries structural loads. The team reports a dry mass of 25 lb and a design capability of up to 30 seconds at nominal chamber conditions. Prometheus powered the Vespula flight on 11 April 2026. It is a student engine design distinct from ESA/ArianeGroup’s unrelated LOX/methane Prometheus demonstrator.
Identity
- Aliases
- PrometheusYellow Jacket Space Program Prometheus
- Domains
- spaceflight
- Identity Level
- model
- Kind
- liquid-rocket-engine
- Name
- YJSP Prometheus
- Status
- development
Details
- Description
- YJSP Prometheus is the Yellow Jacket Space Program’s kerosene/liquid-oxygen ablatively cooled composite rocket engine. Its silica-epoxy thermal liner erodes during firing while a carbon-fibre/epoxy overwrap carries structural loads. The team reports a dry mass of 25 lb and a design capability of up to 30 seconds at nominal chamber conditions. Prometheus powered the Vespula flight on 11 April 2026. It is a student engine design distinct from ESA/ArianeGroup’s unrelated LOX/methane Prometheus demonstrator.
- Dry Mass
- …
- Propellants
- keroseneliquid oxygen
Links
Assets & Meta
- Creation Time
- October 29, 2026 at 15:56:29 UTC
- Updated Time
- October 29, 2026 at 15:56:29 UTC
Other
- Sources
- Accessed Date
- 2026-10-29
- Note
- Identity, cooling, materials, 25 lb mass and stated thermal-duration capability; 30 seconds is not treated as a measured flight burn.
- Published Date
- 2025-10-03
- Publisher
- Yellow Jacket Space Program
- Title
- Prometheus | Vespula Ablative Engine
- Accessed Date
- 2026-10-29
- Note
- Explicitly identifies Prometheus as the ablative engine used for Vespula’s April 2026 flight.
- Publisher
- Yellow Jacket Space Program
- Title
- KeroLOX program and Vespula flight