RD870
Yuzhnoye Design Bureau
The RD870 is a single-chamber dual-thrust staged combustion cryogenic rocket engine developed by Yuzhnoye SDO, designed as the primary propulsion unit for the Cyclone-4M and Cyclone-5 first stages. It burns liquid oxygen and kerosene propellants, producing 79.3 tf of sea-level thrust and 89.4 tf of vacuum thrust, with specific impulses of 301.5 seconds at sea […]
Typed specifications8 values
Discloses 5 of 10 fields engineers filter by in this category (category median 3).
- Mass
- 1 420 kg product page
- Thrust
- 777 667 345 mN product page 876 714 510 mN
- Specific impulse
- 301.5 s product page 340 s
- Propellant
- oxygen product page kerosene (RP-1)
- TRL
- 6 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
- 79.3 tf
- Vacuum thrust
- 89.4 tf
- Specific impulse (sea level)
- 301.5 s
- Specific impulse (vacuum)
- 340 s
- Propellant mixture ratio
- 2.68
- Number of starts
- 1
- Engine weight (excl. gimbal drives)
- 1,420 kg
- Cycle
- Staged combustion, dual-thrust
- TRL
- 6
About
The RD870 is a single-chamber dual-thrust staged combustion cryogenic rocket engine developed by Yuzhnoye SDO, designed as the primary propulsion unit for the Cyclone-4M and Cyclone-5 first stages. It burns liquid oxygen and kerosene propellants, producing 79.3 tf of sea-level thrust and 89.4 tf of vacuum thrust, with specific impulses of 301.5 seconds at sea level and 340 seconds in vacuum. Four RD870 engines are clustered on the Cyclone-4M and Cyclone-5 first stages to form the RD874 propulsion system with a combined thrust of 319.2 tf at sea level. The dual-thrust capability enables optimal performance during different atmospheric flight phases. The engine weighs 1,420 kg excluding gimbal drives and has achieved Technology Readiness Level 6 through the Cyclone-4M development program.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.