RD860
Yuzhnoye Design Bureau
The RD860 is a single-chamber, restartable main engine with a pneumatic pump feed system developed by Yuzhnoye SDO for thrust production and flight control of upper stages, space tugs, and lunar landing modules. It burns nitrogen tetroxide and UDMH propellants with two throttle levels: a main mode at 0.5 tf vacuum thrust and a throttled […]
Typed specifications7 values
Discloses 5 of 10 fields engineers filter by in this category (category median 3).
- Mass
- 34 kg product page
- Thrust
- 4 903 325 mN product page 2 451 662.5 mN
- Specific impulse
- 322.5 s product page
- Propellant
- NTO (N2O4 or MON) product page UDMH
- 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 supplier9 lines, in the manufacturer's own wording
- Propellants
- NT + UDMH
- Vacuum thrust (main mode)
- 0.5 tf
- Vacuum thrust (throttled mode)
- 0.25 tf
- Specific impulse main/throttled (vacuum)
- 322.5 / 316 s
- Propellant mixture ratio
- 2.25
- Number of starts
- 10 (depends on onboard gas capacity)
- Engine weight (excl. gimbal actuators)
- 34 kg
- Feed system
- Pneumatic pump
- TRL
- 6
About
The RD860 is a single-chamber, restartable main engine with a pneumatic pump feed system developed by Yuzhnoye SDO for thrust production and flight control of upper stages, space tugs, and lunar landing modules. It burns nitrogen tetroxide and UDMH propellants with two throttle levels: a main mode at 0.5 tf vacuum thrust and a throttled mode at 0.25 tf, achieving specific impulses of 322.5 and 316 seconds respectively. The engine supports up to 10 restarts (dependent on onboard gas supply), making it well-suited for multi-burn lunar orbital insertion, descent initiation, and landing maneuvers. Technology Readiness Level of 6 confirms demonstration in a relevant environment. Engine weight is 34 kg excluding gimbal actuators, making it a compact and capable lunar propulsion solution.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.