Almaz-T

Plans for an even more sophisticated and capable civilian Almaz 2 spacecraft were made in the early 1990's. Almaz 2's payload mass of 6.5 metric tons would be powered by solar arrays with a maximum beginning-of-life average power rating of 3.8 kW. More than three metric tons of propellants would be available for a mission duration of up to five years at an altitude of 600 km.

Typical orbit: 600 km circular orbit. Mass: 18,500 kg (40,700 lb). Main Engine: RD-0225. Main Engine Thrust: 7.840 kN (1,763 lbf). Main Engine Propellants: N2O4/UDMH. Main Engine Isp: 291 sec.