AKA: Alfa;Alfa-1. Status: Retired 1976. Number: 1 . Thrust: 250.00 kN (56,200 lbf). Gross mass: 6,500 kg (14,300 lb). Unfuelled mass: 1,000 kg (2,200 lb). Burn time: 57 s. Height: 3.80 m (12.40 ft). Diameter: 1.37 m (4.49 ft).