Engine Model: SE-9-3. Manufacturer Name: SE-9. Designer: Rocketdyne. Developed in: 1964. Propellants: N2O4/Aerozine-50. Thrust(vac): 107 N (24 lbf). Isp: 295 sec. Country: USA. First Flight: 1964. Titan III Transtage. Pressure-fed. System included two modules of three engines plus two additional SE-9-5 separate engines, tanks, and a pressuirzation system.