LEK LK moon lander Credit - © Mark Wade

Lunar lander for Energia-launched lunar expedition. The LOK and LK lander would be inserted into lunar orbit by separate Energia launches.

After rendezvous and docking in lunar orbit, three of the five crew aboard the LOK would transfer to the LK and descend to the lunar surface. After 5 to 10 days (5 days standard, 10 with additional consumables) on the surface, the ascent stage of the LK would return to lunar orbit, and the crew would transfer back to the LOK. Prior to landing an unmanned Lunokhod would scout the region, allowing selection of a suitable landing site, and serve as a landing beacon for the precision LK landing.

Crew Size: 3. Design Life: 10 days. Orbital Storage: 30 days. Length: 9.80 m (32.10 ft). Maximum Diameter: 4.60 m (15.00 ft). Span: 8.40 m (27.50 ft). Mass: 29,000 kg (63,000 lb). Electrical System: Solar panels. Associated Launch Vehicle: Energia.

• LK Energia VS.  Other Designations: Vzletnaya stuplen. Part of: LK Energia. Class: Manned. Type: Spacecraft Module. Purpose: Ascent from lunar surface to lunar orbit, dock with LOK Energia.

  Although similar in appearance to LEK ascent stage, 80% smaller and no descent module for reentry into earth's atmosphere.

  Crew Size: 3. Length: 6.40 m (20.90 ft). Basic Diameter: 4.10 m (13.40 ft). Maximum Diameter: 5.80 m (19.00 ft). Mass: 8,500 kg (18,700 lb). Main Engine Propellants: N2O4/UDMH. Main Engine Propellants: 4,200 kg (9,200 lb).

• LK Energia PS.  Other Designations: Posadochnaya stuplen. Part of: LK Energia. Class: Manned. Type: Spacecraft Module. Purpose: Descent from lunar orbit to lunar surface, launch platform for ascent stage.

  LEK LK moon lander LEK LK moon lander Energia-launched... Credit- © Mark Wade

  Descent stage similar in appearance to Apollo LM and LEK stages, but of differing dimensions.

  Length: 3.40 m (11.10 ft). Basic Diameter: 4.60 m (15.00 ft). Maximum Diameter: 9.50 m (31.10 ft). Mass: 20,500 kg (45,100 lb). Main Engine Propellants: N2O4/UDMH. Main Engine Propellants: 14,500 kg (31,900 lb).