RD843
Yuzhnoye Design Bureau
The RD843 is a single-chamber, fixed-thrust, restartable liquid-propellant engine developed by Yuzhnoye SDO to produce thrust and control the pitch and yaw of launch vehicle upper stages. It burns nitrogen tetroxide and UDMH propellants and achieves a vacuum specific impulse of 315.5 seconds with a vacuum thrust of 0.25 tf. The engine supports up to […]
Typed specifications6 values
Discloses 5 of 10 fields engineers filter by in this category (category median 3).
- Mass
- 16.5 kg product page
- Thrust
- 2 451 662.5 mN product page
- Specific impulse
- 315.5 s product page
- Propellant
- NTO (N2O4 or MON) product page UDMH
- TRL
- 9 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 supplier7 lines, in the manufacturer's own wording
- Propellants
- NT + UDMH
- Vacuum thrust
- 0.25 tf
- Specific impulse (vacuum)
- 315.5 s
- Propellant mixture ratio
- 2.0
- Number of starts
- 8 (expandable)
- Engine weight (without gimbal actuators/frame)
- 16.5 kg
- TRL
- 9
About
The RD843 is a single-chamber, fixed-thrust, restartable liquid-propellant engine developed by Yuzhnoye SDO to produce thrust and control the pitch and yaw of launch vehicle upper stages. It burns nitrogen tetroxide and UDMH propellants and achieves a vacuum specific impulse of 315.5 seconds with a vacuum thrust of 0.25 tf. The engine supports up to 8 restarts in its expandable configuration with a proven Technology Readiness Level of 9, reflecting its full operational maturity. Originally developed for the Vega and Vega-C launch vehicles’ AVUM upper stage, the RD843 has demonstrated high reliability across multiple European space missions. Weighing only 16.5 kg excluding gimbal actuators and frame, it is a compact and flight-proven upper stage thruster.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.