Upper stage / space tug - out of production. Centaur for Titan 4

Unit Cost $: 23.000 million. Length: 9.00 m (29.50 ft). Basic Diameter: 4.33 m (14.20 ft). Span: 4.33 m (14.20 ft). Mass: 23,880 kg (52,640 lb). Main Engine: RL-10A-3A. Main Engine: 141 kg (310 lb). Main Engine Thrust: 146.800 kN (33,002 lbf). Main Engine Propellants: Lox/LH2. Main Engine Propellants: 21,105 kg (46,528 lb). Main Engine Isp: 444 sec.