Encyclopedia Astronautica
Soyuz sn 21


Crew: Yakovlev, Porvatkin. Soyuz s/n 21 equipped with the passive Kontakt rendezvous/docking system of the LK lunar lander. Would have served as a docking target for Soyuz s/n 20 . A crew transfer using the Krechet spacesuit would presumably have taken place. Backup crew: Kovalyonok, Isakov.

Soyuz s/n 21 equipped with the passive Kontakt rendezvous/docking system of the LK lunar lander. Would have served as a docking target for Soyuz s/n 20 . A crew transfer using the Krechet spacesuit would presumably have taken place.

By December 1970, there were four crews in training for two pairs of Soyuz spacecraft to be launched to test the Kontakt lunar rendezvous/docking system. During the Salyut 1 mission, in June 1971, six crews were identified and assigned to specific Soyuz spacecraft serial numbers for these tests. These would have been launched in three pairs beginning in early 1972, depending on the schedule for the DOS-2 station. In the event, the death of the Soyuz 11 crew, and subsequent redesign of the Soyuz spacecraft, led to these Kontakt missions being cancelled and the whole Kontakt test series being reformulated with new crew members in early 1973. Soyuz Kontakt 1 would have been the active spacecraft of the first mission.

AKA: Soyuz s/n 21.
First Launch: 1972 Early.

More... - Chronology...


Associated People
  • Porvatkin Porvatkin, Nikolai Stepanovich (1932-2009) Russian engineer cosmonaut, 1967-1983. Graduated from Technical Air Force School, 1952. Graduated from Zhukovsky Air Force Engineering Academy, Monino, 1960. Cosmonaut training May 1967 - 18 August 1967. Worked at NPO Energia. More...
  • Isakov Isakov, Vladimir Timofeyevich (1940-) Russian navigator cosmonaut, 1967-1983. More...
  • Yakovlev Yakovlev, Oleg Anatolyevich (1940-1990) Russian pilot cosmonaut, 1965-1973. More...
  • Kovalyonok Kovalyonok, Vladimir Vasilyevich (1942-) Belarusian pilot cosmonaut. Flew on Soyuz 25, Salyut 6 EO-2, Salyut 6 EO-6. More...

See also
Associated Programs
  • Lunar L3 The Soviet program to land a man on the moon and return him safely to earth. More...

Soyuz sn 21 Chronology


1971 June 15 - .
1972 Early - .
  • Soyuz sn 21 (cancelled) - . Crew: Dobrovolsky; Sevastyanov. Nation: USSR. Related Persons: Dobrovolsky; Sevastyanov. Program: Lunar L3. Flight: Soyuz sn 21. Spacecraft: Soyuz Kontakt. Summary: Soyuz s/n 21 equipped with the passive Kontakt rendezvous/docking system of the LK lunar lander. Would have served as a docking target for Soyuz s/n 20 . A crew transfer using the Krechet spacesuit would presumably have taken place..

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