LOx/LH2 propellant rocket stage. Planned version for Angara. 5 restarts.
Status: In development. Thrust: 73.50 kN (16,523 lbf). Gross mass: 23,300 kg (51,300 lb). Unfuelled mass: 3,500 kg (7,700 lb). Specific impulse: 461 s. Height: 8.60 m (28.20 ft). Diameter: 4.10 m (13.40 ft). Span: 4.10 m (13.40 ft).