Designer: Rocketdyne. Used on stages: Redstone. Used on launch vehicles: Redstone. Propellants: Lox/AlcoholThrust(vac): 42,251 kgf. Thrust(vac): 414.30 kN. Isp: 265 sec. Isp (sea level): 235 sec. Burn time: 155 sec. Mass Engine: 658 kg. Diameter: 1.8 m. Chambers: 1. Country: USA. Status: Out of Production. First Flight: 1960. Last Flight: 1967. Flown: 16.