AKA: Alcor IB. Status: Retired 1975. Thrust: 42.00 kN (9,441 lbf). Gross mass: 500 kg (1,100 lb). Unfuelled mass: 88 kg (194 lb). Burn time: 26 s. Height: 1.90 m (6.20 ft). Diameter: 0.52 m (1.70 ft).