RD-276
RD-276, formerly described as RD-275M/14D14M, is the final uprated Proton-M first-stage variant: a single-chamber nitrogen-tetroxide/UDMH engine using oxidizer-rich staged combustion. Proton-PM identifies it as a modernized RD-253/RD-275 derivative, records service from 2007, and reports its continued use on Proton-M launches in 2026.
Identity
- Aliases
- RD-275M14D14M
- Domains
- spaceflight
- Identity Level
- variant
- Kind
- liquid-rocket-engine
- Name
- RD-276
- Status
- active
Details
- Description
- RD-276, formerly described as RD-275M/14D14M, is the final uprated Proton-M first-stage variant: a single-chamber nitrogen-tetroxide/UDMH engine using oxidizer-rich staged combustion. Proton-PM identifies it as a modernized RD-253/RD-275 derivative, records service from 2007, and reports its continued use on Proton-M launches in 2026.
- Developers
- Family
- Lineage
- Note
- Proton-PM identifies RD-276 as the final modernized version following RD-253 and RD-275; JAXA's technical history reconciles the earlier RD-275M/14D14M designation to the same engine.
- Related Propulsion System
- Relationship
- direct-derivative-of
- Sources
- Accessed Date
- 2026-07-29
- Publisher
- Proton-PM
- Title
- RD-276 engine for Proton-M
- Accessed Date
- 2026-07-29
- Publisher
- Japan Aerospace Exploration Agency repository
- Title
- Technical history and performance of the RD-253 engine family
- Manufacturers
- Propellants
- nitrogen tetroxideUDMH
- Rocket Specs
- Chamber Count
- 1
- Cycle
- oxidizer-rich staged combustion
- Sea Level Specific Impulse S
- 288
- Sea Level Thrust Kn
- 1,671
- Vacuum Specific Impulse S
- 315.8
- Vacuum Thrust Kn
- 1,832
- Service Entry Date
- 2007
Links
Assets & Meta
- Creation Time
- July 29, 2026 at 11:57:58 UTC
- Updated Time
- August 23, 2026 at 18:57:02 UTC
Other
- Sources
- Accessed Date
- 2026-07-29
- Publisher
- Japan Aerospace Exploration Agency repository
- Title
- Technical history and performance of the RD-253 engine family
- Accessed Date
- 2026-07-29
- Publisher
- Proton-PM
- Title
- RD-276 engine for Proton-M
- Accessed Date
- 2026-08-23
- Note
- Proton-PM reports six RD-276 engines operating on the Proton-M first stage in the 12 February 2026 430th Proton launch, supporting the active lifecycle status and current vehicle use.
- Publisher
- Proton-PM
- Title
- Proton-PM engines power the 430th Proton launch
- Accessed Date
- 2026-07-29
- Note
- Supports the legacy vehicle installation and the narrow canonical identity used during migration.
- Publisher
- Official vehicle or program source
- Title
- Proton-M official vehicle reference