Description

The RD-843 is the one-chamber multi-start pressurized fuel feed rocket engine.

Engine is intended for creation thrust and flight control in two stabilizing channels of Vega LV upper stages. Thrust vector control is effected through an engine rotation in a gimbal suspension in two perpendicular planes.

Specifications

Technical characteristics Value
Propellant components:

oxidizer

fuel

 

 

NTO (N2O4)

UDMH ((CH3)2N2H2)

Vacuum thrust, kgf 250
Vacuum specific propulsive burn, s 315,5
Cruise engine mass (without plate and gears), kg 15,93
Number of restarts during the flight 5
Operating time during the flight per 5 restarts, s 667