RD815
Yuzhnoye Design Bureau
The RD815 is a single-chamber dual-thrust staged combustion cryogenic rocket engine developed by Yuzhnoye SDO as the core propulsion element for the advanced Mayak family of heavy and super heavy-lift launch vehicles. Burning liquid oxygen and kerosene, it produces 251.3 tf of sea-level thrust and 274.5 tf of vacuum thrust, with specific impulses of 306.7 […]
Typed specifications8 values
Discloses 5 of 10 fields engineers filter by in this category (category median 3).
- Mass
- 3 200 kg product page
- Thrust
- 2 464 411 145 mN product page 2 691 925 425 mN
- Specific impulse
- 306.7 s product page 335 s
- Propellant
- oxygen product page kerosene (RP-1)
- TRL
- 4 product page
Each value is typed with its unit and measurement condition and cites the datasheet page it was taken from. Nothing is guessed: a field that is absent here has not been published by the manufacturer. machine-extracted ✓ checked by NewSpace Market ✓ manufacturer confirmed by the manufacturer.
As published by the supplier10 lines, in the manufacturer's own wording
- Propellants
- O2 + kerosene
- Sea level thrust
- 251.3 tf
- Vacuum thrust
- 274.5 tf
- Specific impulse (sea level)
- 306.7 s
- Specific impulse (vacuum)
- 335 s
- Propellant mixture ratio
- 2.7
- Number of starts
- 1
- Engine weight (incl. mounts and gimbal actuators)
- 3,200 kg
- Cycle
- Staged combustion, dual-thrust
- TRL
- 4
About
The RD815 is a single-chamber dual-thrust staged combustion cryogenic rocket engine developed by Yuzhnoye SDO as the core propulsion element for the advanced Mayak family of heavy and super heavy-lift launch vehicles. Burning liquid oxygen and kerosene, it produces 251.3 tf of sea-level thrust and 274.5 tf of vacuum thrust, with specific impulses of 306.7 seconds at sea level and 335 seconds in vacuum. Multiple RD815 engines are clustered across the Mayak variants: 3 engines on Mayak-M-3.9 core, up to 18 booster engines plus 3 core engines on Mayak-SH-7, creating combined sea-level thrusts ranging from ~754 tf to ~5,278 tf. The engine weighs 3,200 kg including mounts and gimbal actuators. Currently at Technology Readiness Level 4, it is under active development.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.