KVD-1 (11D56) cryogenic rocket engine
KVD-1, identified in NASA propulsion-facility material as the 11D56/KVD-1 LOX/LH2 engine, is a historical Russian cryogenic upper-stage engine used in the imported 12KRB stage of India's GSLV Mk I. ISRO documents the earlier GSLV configuration as a Russian-supplied cryogenic stage; this record preserves the exact KVD-1 identity and application while leaving cycle and performance fields unset because the current primary evidence is not specific enough.
Identity
- Aliases
- KVD-111D56/KVD-111D56
- Domains
- spaceflight
- Identity Level
- model
- Kind
- liquid-rocket-engine
- Name
- KVD-1 (11D56) cryogenic rocket engine
- Status
- historical
Details
- Description
- KVD-1, identified in NASA propulsion-facility material as the 11D56/KVD-1 LOX/LH2 engine, is a historical Russian cryogenic upper-stage engine used in the imported 12KRB stage of India's GSLV Mk I. ISRO documents the earlier GSLV configuration as a Russian-supplied cryogenic stage; this record preserves the exact KVD-1 identity and application while leaving cycle and performance fields unset because the current primary evidence is not specific enough.
- Propellants
- liquid oxygenliquid hydrogen
Links
Assets & Meta
- Creation Time
- August 15, 2026 at 05:37:45 UTC
- Updated Time
- August 15, 2026 at 05:37:45 UTC
Other
- Sources
- Accessed Date
- 2026-08-14
- Note
- NASA's liquid-engine test-facility assessment identifies the 11D56/KVD-1 LOX/LH2 engine and notes its use in the Indian GSLV cryogenic stage, while distinguishing the modified 11D56M application on Proton.
- Publisher
- NASA Technical Reports Server
- Title
- Liquid Engine Test Facilities Assessment
- Accessed Date
- 2026-08-14
- Note
- ISRO identifies the original GSLV Mk I configuration as using an imported Russian cryogenic upper stage before the indigenous CE-7.5 stage entered GSLV Mk II; this source supports the documented vehicle application without adding unsupported engine specifications.
- Publisher
- Indian Space Research Organisation
- Title
- Geosynchronous Satellite Launch Vehicle Mark II