Kosberg LOx/LH2 rocket engine. Upper stages. Design concept 1998-. Concept for a cryogenic engine for upper stages. Single annular chamber with straight expansion nozzle, common turbopump.
AKA: RO-97E. Status: Design concept 1998-. Date: 1998-. Thrust: 39.20 kN (8,813 lbf). Specific impulse: 472 s.
Engine: 234 kg (515 lb). Chamber Pressure: 70.00 bar.