Encyclopedia Astronautica
LEK Lunar Expeditionary Complex



zvulkanb.jpg
LEK Lunar Base
LEK Lunar Expeditionary Complex
Credit: © Mark Wade
zlekfmew.jpg
LEK Lunar Expedition
LEK Lunar Expeditionary Complex
Credit: © Mark Wade
zlklek2.jpg
Soviet Lunar Landers
Landing stages for Soviet lunar expeditions. Top row, left to right: L3 original version; LK; LK-3; LK-700; two versions of the L3M; LEK for Energia-launched lunar landing. Bottom row, lunar base elements: Chelomei KLE; Chelomei Heavy Lunokhod; Barmin DLB base module; LZM, LZhM, Lunokhod, and LEK for Glushko LEK Vulkan-launched lunar base.
Credit: © Mark Wade
Russian manned lunar base. Cancelled 1974. Although the N1, L3, and DLB projects were cancelled, Glushko still considered the establishment of a moon base to be a primary goal for his country.

While the Americans had achieved the first moon landing, they had retreated to earth orbit and cancelled further Apollo flights. There existed an opportunity, through establishment of a permanent Soviet moon base, to steal the lead in the space race. Analysis of the results of previous unmanned and manned lunar missions indicated that the moon was suited for a variety of 'special investigations. A permanent manned lunar expeditionary complex (LEK) would be required to accomplish this. In 1974 Glushko proposed having an LEK Lunar Base in place by 1980 using his Vulkan booster. The Soviet leadership saw it differently, and in 1976 prohibited further work and deferred any further lunar base research to the 21st Century.

To launch the elements of the LEK, Glushko proposed a new launch vehicle, the Vulkan. The August 1974 initial version of the Vulkan, the RLA-150, used liquid oxygen/kerosene propellants in all lower stages. This was in keeping with existing recommendations of the Ministry of Defense under Plan Poisk. Total cost of the RLA launch vehicle development program alone was put at 12.5 billion rubles.

After a poor reception of this concept by the Military-Industrial Commission, the Vulkan was redesigned to use the LOX/LH2 engine technology developed for the US Space Shuttle in the core stage. This would be surrounded by six strap-on boosters, using LOX/Kerosene engines, to be developed by NPO Yuzhnoye in the Ukraine. This use of cryogenic propellants represented a complete turnaround for Glushko, who had advocated use of storable but toxic rocket propellants in a bitter fight with Korolev and Mishin for fifteen years. This version of the Vulkan can be seen as a bridge concept leading to the core vehicle of the Energia/Buran launch vehicle authorized in 1976.

The Vulkan was designed to deliver 230 metric tons into a 200 km low earth orbit; 60 metric tons to lunar orbit; and 22 metric tons to the lunar surface.

NPO Energia engineers, using internal funds, elaborated designs for lunar base components over the next three years . These would take advantage of the payload capacity of the Vulkan and the Block R cryogenic stage to land complete housing units, laboratories, and long-distance rovers on the lunar surface of up to 22 metric tons mass. This would considerably simplify base build-up and operations compared to the 9 metric ton modules the N1 could deliver.

The LEK consisted of expeditionary and transport lunar spacecraft (Chief Designer K D Bushuyev) and equipment for the permanent base station (Chief Designer I S Prudnikov).

The expeditionary and transport craft consisted of:

  • LEK (Lunar Expeditionary Spacecraft). As in the original LK lunar lander, this would be taken to near zero velocity near the lunar surface by the Vulkan Block V 'lunar crasher' rocket stage. It would then descend to the lunar surface using a landing stage nearly identical to the American lunar module descent stage. This landing stage however would primarily provide propulsion of the upper ascent/earth recovery stage to a trans-earth trajectory. The ascent/earth recovery stage consisted of a re-entry capsule in the shape of, but larger than, the Soyuz descent module, encapsulated in a larger spherical pressurized compartment providing crew quarters and equipment storage. Without the constraints of having to dock with another spacecraft or station in lunar orbit, this direct flight approach would allow a base at any point on the surface to be supported at any time of the month.

  • LZhM (Laboratory-Residence Module) for three men as the home base for living and working during the expedition. This used a simpler descent stage with minimal propellant for the soft landing on the moon following separation from its Block V lunar crasher stage.

The equipment of the permanent base station consisted of:

  • Lunokhod - a large manned wheeled mobile pressurized laboratory with a working radius of up to 200 km from the base. The Lunokhod would also be used for loading and unloading operations, and had a grader for burying the nuclear reactors which would power the complex and the laying out of 'streets' and protective berms for the base itself.

  • LZM (Laboratory-Factory Module) provided biological and physics laboratories in two lobes. In the other was a factory for production of oxygen from the lunar soil. This used the same simple descent module as the LZhM.

  • Nuclear power stations to power all of the modules of the lunar base. Each module of the complex was outfitted with its own autonomous power station. After landing, this would be removed from the landing stages and buried a distance away from the module before being put into operation.

  • Transport spacecraft for delivery of expendable and consumable equipment and supplies to the surface. These would use the simple descent module.
The LEK was expected to conduct a wide variety of scientific and engineering studies:

  • Study of other planets, astrophysics, and astronomy using telescopes covering the entire electromagnetic spectrum from the stable platform of the lunar surface

  • Medical and biological studies, including perhaps the production of new bacteriological warfare agents

  • Production of new materials and gases from the lunar soil (including oxygen for human activities and eventually as rocket oxidizer) and the collection of helium isotopes from solar wind for nuclear fusion reactors on earth
Preceding construction of the LEK would be reconnaissance by Ye-8 series unmanned craft developed by Lavochkin. These would conduct cartographic surveys, study the relief of the lunar surface, and obtain soil samples to a depth of 10 m from prospective sites. As in the earlier L3 and Zvezda concept, the landers, having surveyed the site, would act as a radio location beacon for the precision landing of follow-on elements of the complex.

Delivery of the components of the LEK would be in three stages:

  • Stage 1 - Three Vulkan launches would deliver the LZhM, Lunokhod (with scientific apparatus and consumables for 18 months), and an LEK with a crew of three.

  • Stage 2 - Two Vulkan launches to land another LZhM, an open-cabin Lunokhod, and an LEK with a crew of three men for an occupation of six months.

  • Stage 3 - One Vulkan launch of the LZM and further scientific apparatus (three months after the start of stage 2). This would give the base the capability to produce its own oxygen.
Thereafter it would be necessary to resupply the base once a year with consumable supplies. Additional Vulkan launches would be made to rotate crews to the permanent base as necessary.

The LEK study and initial Vulkan design were completed by the end of 1975. However the Academy of Sciences Expert Commission chaired by Keldysh decided in 1978 that the LEK Project should be deferred into the next century. Glushko and NPO Energia were told to quit dreaming and devote themselves only to projects with national economic importance, like the Buran space shuttle. This put a definitive end to the three major lunar base projects studied by Korolev, Mishin, and Glushko in 1962-1975. Glushko simply waited. He restarted design work on a lunar base, using the Energia launch vehicle as the booster, after the first Buran launch in 1988.

Characteristics

Crew Size: 2. Habitable Volume: 25.00 m3. Electric System: 8.00 average kW.

Gross mass: 8,200 kg (18,000 lb).
Height: 8.00 m (26.20 ft).

More... - Chronology...


Associated Countries
Associated Spacecraft
  • LEK Russian manned lunar lander. Study 1973. Lunar lander for the Vulkan surface base. As in the original LK lunar lander, this would be taken to near zero velocity near the lunar surface by the Vulkan Block V 'lunar crasher' rocket stage. More...
  • Lunokhod LEK Russian manned lunar rover. Study 1973. Lunar rover for the Vulkan Lunar Expedition. The rover provided pressurized quarters for 2 crew, allowing trips up to 200 km from the lunar base at a top speed of 5 km/hr. More...
  • LZhM Russian manned lunar habitat. Study 1973. Laboratory-living module. Three story lunar surface residence and laboratory for Vulkan-launched Lunar Expedition. More...
  • LZM Russian manned lunar habitat. Study 1973. Laboratory-Factory Module for the Vulkan surface base. More...

See also
  • Lunar Bases The Lunar Base never seemed to be a high priority to space visionaries, who were mainly interested in getting on to Mars. It was usually seen as a proving ground for Mars vehicle technology, or as a place to mine propellant for use in a larger space infrastructure. More...
  • Soyuz The Russian Soyuz spacecraft has been the longest-lived, most adaptable, and most successful manned spacecraft design. In production for fifty years, more than 240 have been built and flown on a wide range of missions. The design will remain in use with the international space station well into the 21st century, providing the only manned access to the station after the retirement of the shuttle in 2011. More...

Associated Launch Vehicles
  • Energia The Energia-Buran Reusable Space System (MKS) began development in 1976 as a Soviet booster that would exceed the capabilities of the US shuttle system. Following extended development, Energia made two successful flights in 1987-1988. But the Soviet Union was crumbling, and the ambitious plans to build an orbiting defense shield, to renew the ozone layer, dispose of nuclear waste, illuminate polar cities, colonize the moon and Mars, were not to be. Funding dried up and the Energia-Buran program completely disappeared from the government's budget after 1993. More...

Associated Manufacturers and Agencies
  • Korolev Russian manufacturer of rockets, spacecraft, and rocket engines. Korolev Design Bureau, Kaliningrad, Russia. More...

Bibliography
  • Semenov, Yu. P., S P Korolev Space Corporation Energia, RKK Energia, 1994.

Home - Browse - Contact
© / Conditions for Use