Solid propellant rocket stage. . Used monolithic single motor with Nylon-S propellant. Combustion chamber pressure 30-40 kg/cm2.
Gross mass: 5,850 kg (12,890 lb). Unfuelled mass: 1,150 kg (2,530 lb). Specific impulse: 220 s. Specific impulse sea level: 220 s. Diameter: 1.80 m (5.90 ft). Span: 1.80 m (5.90 ft).