Status: Study 1961. Thrust: 266.80 kN (59,979 lbf). Gross mass: 53,694 kg (118,375 lb). Unfuelled mass: 10,429 kg (22,992 lb). Specific impulse: 800 s. Burn time: 1,250 s. Height: 19.30 m (63.30 ft). Diameter: 10.06 m (33.00 ft). Span: 10.06 m (33.00 ft).