Status: Study 1963. Thrust: 20,015.00 kN (4,499,550 lbf). Gross mass: 2,041,000 kg (4,499,000 lb). Unfuelled mass: 181,000 kg (399,000 lb). Specific impulse: 455 s. Burn time: 408 s. Height: 24.40 m (80.00 ft). Diameter: 21.30 m (69.80 ft). Span: 21.30 m (69.80 ft).