Encyclopedia Astronautica
L2-1963



l21963.jpg
L2-1963
1963 L2 robot lunar rover spacecraft. L2 configuration speculative based on early Ye-8 rover design studies at OKB-1.
Russian lunar rover. Study 1963. The L2 was a project to land a remote-controlled self-propelled rover on the surface of the moon. It was described in a 23 September 1963 letter setting out the space exploration plan for 1965 to 1975.

It would use the same rocket stage and tanker elements developed for the L1 manned circumlunar project. It can be seen to be the direct ancestor of the Ye-8 Lunokhod landers of the 1970's.

The objective of the L-2 would be to conduct scientific research on the lunar surface and to allow selection of a favorable landing point for later manned flights. A television system would send back panoramic television pictures.

The rover would be nuclear-powered and equipped with a radio beacon for later manned expeditions to home on for precision landings. It would also investigate:

  • The relief of the lunar surface
  • The mechanical properties of the lunar soil
  • The microscopic structure of the surface
  • The magnetic fields of the moon
  • Cosmic ray flux
  • Solar insolation at the surface

The L-2 system consisted of:

  • The L-2 crawler. This had a maximum speed of 4 km/hour and a range of 2,500 km. The L-2 consisted of:

    • Motor compartment with equipment permitting speeds of up to 4 km/hour
    • Equipment compartment, with on-board radio, navigation, and control systems
    • Power generating system (evidently solar and/or radioisotope generators)

  • The 13K rocket system for midcourse corrections and lunar braking. This would brake the L-2 to a direct landing on the surface of the moon with no intermediate lunar orbit. It consisted:

    • Braking stage, for midcourse corrections and the main braking impulse for the landing on the surface. This would ignite at an altitude of 200-300 km above the surface.
    • The landing vehicle, with throttled engines, for the soft landing on the surface at a speed of only 2 to 4 m/s.
    • The guidance system
    • The maneuvering and guidance system for docking with the 9K in earth orbit, which was cast off before the translunar injection.

  • The 9K translunar injection stage for sending the L-2 towards the moon from the low earth assembly orbit. This was the Soyuz B rocket stage used on the L-1 project

Total mass of the L-2 + 13K + 9K complex at ignition of the 9K for translunar injection was 23,000 kg. Total mass of the L-2 and 13K in their translunar cruise configuration was 5,000 kg. As was the case for the L-1, six launches of the Soyuz 11A511 booster would be required to assemble the L-2 in a 225 km low earth assembly orbit.

Gross mass: 23,000 kg (50,000 lb).

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Associated Countries
See also
Associated Launch Vehicles
  • Soyuz Russian orbital launch vehicle. The world's first ICBM became the most often used and most reliable launch vehicle in history. The original core+four strap-on booster missile had a small third stage added to produce the Vostok launch vehicle, with a payload of 5 metric tons. Addition of a larger third stage produced the Voskhod/Soyuz vehicle, with a payload over 6 metric tons. Using this with a fourth stage, the resulting Molniya booster placed communications satellites and early lunar and planetary probes in higher energy trajectories. By the year 2000 over 1,628 had been launched with an unmatched success rate of 97.5% for production models. Improved models providing commercial launch services for international customers entered service in the new millenium, and a new launch pad at Kourou was to be inaugurated in 2009. It appeared that the R-7 could easily still be in service 70 years after its first launch. More...

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

Bibliography
  • Vetrov, G S, S. P. Korolev i evo delo, Nauka, Moscow, 1998.

L2-1963 Chronology


1963 September 23 - .
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