Solid propellant rocket stage. Bus powered by four solid propellant motors mounted 90 degrees to each other, each 60 kg mass, 0.77 m long, 0.28 m diameter.
Status: Retired 1990. Thrust: 3.92 kN (881 lbf). Gross mass: 1,300 kg (2,800 lb). Burn time: 101 s. Height: 2.45 m (8.03 ft). Diameter: 1.54 m (5.05 ft).