AKA: National Launch System. Status: Study 1991. Thrust: 14,310.00 kN (3,217,010 lbf). Gross mass: 36,000 kg (79,000 lb). Unfuelled mass: 36,000 kg (79,000 lb). Specific impulse: 425 s. Specific impulse sea level: 350 s. Burn time: 100 s. Height: 9.00 m (29.50 ft). Diameter: 8.70 m (28.50 ft). Span: 9.00 m (29.50 ft).
Cost $ : 40.000 million. No Engines: 4.