AKA: Martlet 4B;Martlet 4i-2;Martlet 4L-2. Status: Development ended 1966. Thrust: 20.60 kN (4,631 lbf). Gross mass: 175 kg (385 lb). Unfuelled mass: 35 kg (77 lb). Specific impulse: 300 s. Specific impulse sea level: 210 s. Burn time: 20 s. Height: 4.00 m (13.10 ft). Diameter: 0.30 m (0.98 ft).
Thrust (sl): 14.400 kN (3,237 lbf). Thrust (sl): 1,470 kgf.