A.M. Isayev S5.35 spacecraft engine
The A.M. Isayev S5.35 was the documented main engine of the first-generation Soyuz 7K-OK spacecraft. This model identity represents the main engine itself; the separately documented backup-engine arrangement and the broader KTDU-35 integrated propulsion system remain distinct identities.
Identity
- Aliases
- S5.35S-5.35Soyuz S5.35
- Domains
- spaceflight
- Identity Level
- model
- Kind
- liquid-rocket-engine
- Name
- A.M. Isayev S5.35 spacecraft engine
- Status
- historical
Details
- Description
- The A.M. Isayev S5.35 was the documented main engine of the first-generation Soyuz 7K-OK spacecraft. This model identity represents the main engine itself; the separately documented backup-engine arrangement and the broader KTDU-35 integrated propulsion system remain distinct identities.
Assets & Meta
- Creation Time
- August 25, 2026 at 18:02:12 UTC
- Updated Time
- August 25, 2026 at 18:02:12 UTC
Other
- Search Name
- A.M. Isayev S5.35 spacecraft engine S5.35 S-5.35 Soyuz S5.35
- Sources
- Accessed Date
- 2026-08-25
- Note
- The 7K-OK aggregate compartment is described with an S5.35 main engine and a separate backup-engine arrangement.
- Publisher
- NASA
- Title
- SP-4408: Rockets and People, Part 1
- Accessed Date
- 2026-08-25
- Note
- The 7K-OK account identifies the SKDU main approach/correction engine unit and its redundant engine arrangement.
- Publisher
- NASA
- Title
- Flying the Soyuz
- Accessed Date
- 2026-08-25
- Note
- Establishes the first-generation 7K-OK spacecraft boundary within the Soyuz programme.
- Publisher
- ESA Historical Archives
- Title
- Soyuz programme