AKA: Cryogenic Upper Stage. Status: Out of production. Thrust: 1,962.03 kN (441,081 lbf). Gross mass: 77,000 kg (169,000 lb). Unfuelled mass: 7,000 kg (15,400 lb). Specific impulse: 455 s. Specific impulse sea level: 352 s. Burn time: 160 s. Height: 16.47 m (54.03 ft). Diameter: 5.70 m (18.70 ft). Span: 5.70 m (18.70 ft).