Status: Design concept 2007. Thrust: 19.60 kN (4,406 lbf). Specific impulse: 344 s. Burn time: 1,100 s. Height: 1.67 m (5.47 ft).

The multi-start pump-fed single-chamber engine featured:

• Thrust and mixture ratio regulation to an accuracy of �1%;
• Total operation time up to 1100seconds
• Generator gas afterburning scheme
• Thrust vector control by gimbaling the chamber in two orthogonal planes; gimbal angle, �8 deg. Roll control provided by roll nozzles tapping off the gas generator.
• Spin-up of booster turbopump and operation of solenoid valves for engine start and restart performed by gas from an autonomous pneumatic unit
• Turbine powered by oxidizer-rich gas.
• Propellants ignited in the gas generator and combustion chamber by use of a starting fuel.

Chamber Pressure: 78.00 bar. Oxidizer to Fuel Ratio: 2.5. Restarts: 6.