Engine Model: RS-72. Manufacturer Name: RS-72. Designer: Rocketdyne, Ottobrunn. Developed in: 1999. Propellants: N2O4/MMH. Thrust(vac): 55.400 kN (12,454 lbf). Isp: 340 sec. Mass Engine: 138 kg (304 lb). Diameter: 1.30 m (4.20 ft). Length: 2.29 m (7.50 ft). Chambers: 1. Chamber Pressure: 60.00 bar. Area Ratio: 300.00. Country: USA. Dasa (Germany)/Rocketdyne Upper Stage. Gas generator, pump-fed. The RS 72 was a bipropellant turbopump rocket engine developed by Ottobrunn together with Boeing-Rocketdyne. The RS 72 was based on the Aestus engine used on the Ariane 5 upper stage. Performance was enhanced with the addition of a Boeing-Rocketdyne XLR 32 turbo-pump.
