Designer: Bell. Used on stages: Agena A . Used on launch vehicles: Atlas LV-3A / Agena A, Thor Agena A. Propellants: Nitric acid/UDMHThrust(vac): 7,031 kgf. Thrust(vac): 68.90 kN. Isp: 276 sec. Burn time: 120 sec. Mass Engine: 127 kg. Diameter: 1.5 m. Length: 2.2 m. Chambers: 1. Chamber Pressure: 10.00 bar. Area Ratio: 20.00. Thrust to Weight Ratio: 55.36. Country: USA. Status: Out of Production. First Flight: 1959. Last Flight: 1961. Flown: 20.