AKA: HJ Nike Nike 20-inch SM-4. Status: Retired 1959. Thrust: 30.00 kN (6,744 lbf). Gross mass: 100 kg (220 lb). Unfuelled mass: 10 kg (22 lb). Burn time: 8.50 s. Height: 0.70 m (2.29 ft). Diameter: 0.51 m (1.67 ft).