Soyuz 7K-L1 No.5L

Soyuz 7K-L1 No.5L

A Soyuz 7K-L1 spacecraft
Mission type Lunar flyby
Spacecraft test
Mission duration Failed to orbit
Spacecraft properties
Spacecraft type Soyuz 7K-L1
Manufacturer OKB-1
Launch mass 5,390 kilograms (11,880 lb)
Start of mission
Launch date 22 November 1967, 19:07:59 (1967-11-22UTC19:07:59Z) UTC
Rocket Proton-K/D s/n 230-01
Launch site Baikonur 81/24

Soyuz 7K-L1 No.5L, sometimes identified by NASA as Zond 1967B,[1] was a Soviet spacecraft which was launched in 1967 as part of the Zond programme. It was a 5,390-kilogram (11,880 lb) Soyuz 7K-L1 spacecraft, the second of nine to be launched.[2][3] It was intended to perform a circumlunar flyby of the Moon before returning to the Earth for landing, but failed to achieve Earth orbit.

Soyuz 7K-L1 No.5L was launched at 19:07:59 UTC on 22 November 1967 atop a Proton-K 8K78K carrier rocket with a Blok D upper stage, flying from Site 81/24 at the Baikonur Cosmodrome.[4] One of the rocket's second stage engines failed to ignite, which caused the launch to be aborted and the spacecraft to separate by means of its SAS launch escape system. The descent module came down 285 kilometres (177 mi) downrange. Its landing motors fired prematurely, resulting in a harder landing than expected, and the spacecraft was subsequently dragged 550 metres (1,800 ft) by its parachute. It was subsequently collected by a Mil Mi-4 helicopter.[5] Prior to the release of information about its mission, NASA correctly identified that it had been a test of a spacecraft intended for manned Lunar flights. However, they were unsure whether it was intended to reach the Moon itself.[1]

References

  1. 1 2 Williams, David R. (6 January 2005). "Tentatively Identified Missions and Launch Failures". NASA NSSDC. Retrieved 30 July 2010.
  2. ↑ Wade, Mark. "Soyuz 7K-L1". Encyclopedia Astronautica. Retrieved 27 July 2010.
  3. ↑ Krebs, Gunter. "Zond (L1)". Gunter's Space Page. Retrieved 27 July 2010.
  4. ↑ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 27 July 2010.
  5. ↑ Wade, Mark. "Proton". Encyclopedia Astronautica. Retrieved 27 July 2010.
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