H-1
Rocketdyne's uprated Thor/Jupiter-derived LOX/RP-1 gas-generator engine used in clusters on Saturn I and Saturn IB. NASA documents the Saturn C-I first stage as a cluster of eight H-1 engines and the first Saturn launch on 1961-10-27; this record dates the H-1's first flight to that launch while keeping the H-1 identity distinct from its S-3D predecessor. NASA records the Saturn IB B-1/H-1 configuration at 205,000 lbf (912.25 kN) sea-level thrust per engine, about 263.4 s specific impulse, and 150 s operation.
Identity
- Domains
- spaceflight
- Identity Level
- model
- Kind
- liquid-rocket-engine
- Name
- H-1
- Status
- retired
Details
- Description
- Rocketdyne's uprated Thor/Jupiter-derived LOX/RP-1 gas-generator engine used in clusters on Saturn I and Saturn IB. NASA documents the Saturn C-I first stage as a cluster of eight H-1 engines and the first Saturn launch on 1961-10-27; this record dates the H-1's first flight to that launch while keeping the H-1 identity distinct from its S-3D predecessor. NASA records the Saturn IB B-1/H-1 configuration at 205,000 lbf (912.25 kN) sea-level thrust per engine, about 263.4 s specific impulse, and 150 s operation.
- Developers
- First Flight Date
- 1961-10-27
- Lineage
- Note
- NASA identifies Saturn's H-1 as an upgraded version of the Thor/Jupiter powerplant represented by S-3D.
- Related Propulsion System
- Relationship
- direct-derivative-of
- Sources
- Accessed Date
- 2026-07-29
- Publisher
- NASA
- Title
- 60 Years Ago: First Launch of a Saturn Rocket
- Manufacturers
- Propellants
- RP-1liquid oxygen
- Rocket Specs
- Burn Time S
- 150
- Cycle
- gas generator
- Sea Level Specific Impulse S
- 263.4
- Sea Level Thrust Kn
- 912.25
Links
Assets & Meta
- Creation Time
- July 29, 2026 at 08:40:16 UTC
- Updated Time
- August 22, 2026 at 06:16:10 UTC
- Image
- Download
Other
- Sources
- Accessed Date
- 2026-07-29
- Note
- Supports the legacy vehicle installation and the narrow canonical identity used for migration.
- Publisher
- Official vehicle or program source
- Title
- Saturn I Block II official vehicle reference
- Accessed Date
- 2026-07-29
- Note
- Supports the legacy vehicle installation and the narrow canonical identity used for migration.
- Publisher
- Official vehicle or program source
- Title
- Saturn I Block I official vehicle reference
- Accessed Date
- 2026-07-29
- Note
- Supports the legacy vehicle installation and the narrow canonical identity used for migration.
- Publisher
- Official vehicle or program source
- Title
- Saturn IB official vehicle reference
- Accessed Date
- 2026-08-14
- Note
- NASA documents the H-1/B-1 LOX/RP-1 engine's gas-generator-driven turbopump, 205,000-pound sea-level thrust, 263.4-second specific impulse, 150-second burn, and eight-engine Saturn IB cluster.
- Publisher
- NASA Technical Reports Server
- Title
- Saturn Rocket Propulsion: H-1 and J-2 Engine Data