E2 sea-level variants
E2 Sea Level variants are ABL Space Systems' historical family of Jet-A/LOX gas-generator-cycle sea-level E2 configurations for RS1's first stage. ABL identifies E2 Sea Level Radial and a compact double-chamber E2 Sea Level Center variant; both belong to the E2 family, and ABL reports more than 16,000 lbf of vacuum thrust for each configuration. This family record preserves the radial/center distinction rather than asserting a single engine installation.
Identity
- Aliases
- E2 Sea LevelE2 Sea Level RadialE2 Center
- Domains
- spaceflight
- Identity Level
- family
- Kind
- liquid-rocket-engine
- Name
- E2 sea-level variants
- Status
- historical
Details
- Description
- E2 Sea Level variants are ABL Space Systems' historical family of Jet-A/LOX gas-generator-cycle sea-level E2 configurations for RS1's first stage. ABL identifies E2 Sea Level Radial and a compact double-chamber E2 Sea Level Center variant; both belong to the E2 family, and ABL reports more than 16,000 lbf of vacuum thrust for each configuration. This family record preserves the radial/center distinction rather than asserting a single engine installation.
- Developers
- Family
- Manufacturers
- Propellants
- Jet-Aliquid oxygen
- Rocket Specs
- Cycle
- gas-generator
Links
Assets & Meta
- Creation Time
- July 29, 2026 at 11:21:13 UTC
- Updated Time
- August 21, 2026 at 16:57:56 UTC
Other
- Sources
- Accessed Date
- 2026-08-21
- Note
- ABL's official E2 engineering article identifies the sea-level E2 configurations as E2 Sea Level Radial and a tightly packaged double-chamber E2 Sea Level Center variant, using Jet-A/liquid oxygen in a gas-generator cycle with a single-shaft turbopump and more than 16,000 lbf of vacuum thrust.
- Publisher
- ABL Space Systems
- Title
- Building a Rocket Engine from Scratch
- Accessed Date
- 2026-08-21
- Note
- ABL's RS1 Payload User's Guide provides the first-stage vehicle context for the sea-level E2 family without collapsing the radial and center configurations into one model.
- Publisher
- ABL Space Systems
- Title
- RS1 Payload User's Guide, Version 1.0
- Accessed Date
- 2026-08-21
- Note
- SpaceNews reports ABL's November 2024 exit from the commercial launch market and shift to missile defense, supporting the historical lifecycle status of this RS1-oriented family record.
- Publisher
- SpaceNews
- Title
- ABL Space exits commercial launch market, shifts focus to missile defense