NK-33A
NK-33A is the LOX/RP-1 oxidizer-rich staged-combustion derivative of the Kuznetsov NK-33 family used as the first-stage engine of the Soyuz-2.1v launch vehicle. UEC-Kuznetsov publishes 154.5 tf sea-level thrust, 331 s vacuum specific impulse, 148.7 kgf/cm² chamber pressure, 200 s flight operation, and 600 s resource; its product page also describes the engine as multiple-start. The company page records regular Soyuz-2.1v operation after 2013–2019 flight tests and NK-33A-powered launches in 2025. The exact Soyuz-2.1v installation remains represented by the existing canonical relationship rather than recreated here.
Identity
- Aliases
- NK-33AKuznetsov NK-33ASoyuz-2.1v NK-33AUEC NK-33A
- Domains
- spaceflight
- Identity Level
- variant
- Kind
- liquid-rocket-engine
- Name
- NK-33A
- Status
- active
Details
- Description
- NK-33A is the LOX/RP-1 oxidizer-rich staged-combustion derivative of the Kuznetsov NK-33 family used as the first-stage engine of the Soyuz-2.1v launch vehicle. UEC-Kuznetsov publishes 154.5 tf sea-level thrust, 331 s vacuum specific impulse, 148.7 kgf/cm² chamber pressure, 200 s flight operation, and 600 s resource; its product page also describes the engine as multiple-start. The company page records regular Soyuz-2.1v operation after 2013–2019 flight tests and NK-33A-powered launches in 2025. The exact Soyuz-2.1v installation remains represented by the existing canonical relationship rather than recreated here.
- Developers
- First Flight Date
- 2013-12-28
- Lineage
- Note
- UEC-Kuznetsov states that NK-33A is a modification of the base NK-33, adapted with JSC Progress Rocket Space Centre for the Soyuz-2.1v first-stage installation.
- Related Propulsion System
- Relationship
- direct-derivative-of
- Sources
- Accessed Date
- 2026-08-20
- Note
- UEC-Kuznetsov identifies NK-33A as a modification of base NK-33 and describes its adaptation with JSC Progress Rocket Space Centre for Soyuz-2.1v.
- Publisher
- United Engine Corporation (UEC)
- Title
- NK-33A rocket engine
- Manufacturers
- Propellants
- RP-1liquid oxygen
- Rocket Specs
- Burn Time
- …
- Cycle
- oxidizer-rich staged combustion
- Restartable
- Yes
- Sea Level Thrust
- …
- Vacuum Specific Impulse
- …
Links
Assets & Meta
- Creation Time
- August 13, 2026 at 21:12:05 UTC
- Updated Time
- August 23, 2026 at 21:35:41 UTC
Other
- Sources
- Accessed Date
- 2026-08-13
- Note
- Official product page identifies installation of the NK-33A engine on the Soyuz-2.1v core module.
- Publisher
- JSC Progress Rocket Space Centre
- Title
- Soyuz 2.1V launch vehicle
- Accessed Date
- 2026-08-13
- Note
- Official launch release identifies the NK-33A core engine and RD0110R control engine on Soyuz-2-1v.
- Publisher
- JSC Progress Rocket Space Centre
- Title
- Soyuz 2-1V launch release
- Accessed Date
- 2026-08-20
- Note
- UEC-Kuznetsov current NK-33A product page publishes 154.5 tf sea-level thrust, 331 s vacuum specific impulse, 148.7 kgf/cm² chamber pressure, 200 s flight operating time, 600 s resource, Soyuz-2.1v application, and describes the engine as multiple-start.
- Publisher
- United Engine Corporation (UEC)
- Title
- NK-33A rocket engine
- Accessed Date
- 2026-08-14
- Note
- UEC-Kuznetsov company page states that NK-33A equips Soyuz-2.1v first stages, entered regular operation after 2013–2019 flight tests, and supported Soyuz launches in 2025.
- Publisher
- United Engine Corporation (UEC)
- Title
- JSC UEC-Kuznetsov