Cosmonauts:                        

Vladimir Lyakhov
(First Space Flight) Flight Engineer:
Valery Ryumin
(Second Space Flight)
Soyuz 34
Backup Crew: Commander: Nil                                 
Soyuz 34 (Russian: Союз 34, Union 34) was a 1979 Soviet unmanned space flight to the Salyut 6 Space Station It was sent to supply the resident crew a reliable return vehicle after the previous flight, Soyuz 33, suffered an engine failure.

Mission control decided to re-design the engine used on Soyuz craft as a result of the Soyuz 33 failure, and to return the Soyuz 32 craft which transported Vladimir Lyakhov and Valery Ryumin to the space station to earth unmanned as it had the same suspect engine as Soyuz 33. Soyuz 34 successfully returned the crew to earth 73 days after launching.


Command Pilot:













 









 




Cosmonauts:
NONE                       



Soyuz 34


     
The Soyuz Space  Missions


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Soyuz 34

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courtesy: Wikipedia.org
Soyuz 34 had been intended to have been launched around 6 June 1979 with a two-man Hungarian/Soviet crew. That crew would have presumably returned in Soyuz 33 which had been planned to be docked at the Salyut 6 space station. Suspicions this was originally to be a Hungarian/Soviet flight were confirmed in 1980 when press releases for an upcoming joint mission were still dated June 1979.

However, the engine failure during Soyuz 33's flight in April necessitated a shuffling of planned missions. Because the engine used in that flight was the same model already docked at the space station on Soyuz 32 and the resident crew of Vladimir Lyakhov and Valery Ryumin needed a reliable craft to return to Earth in, it was decided that the engine needed to be modified and a fresh return vehicle sent to the station - vacant.

Soyuz 34 was launched uncrewed on 6 June, and docked at the aft port of the space station on 9 June. The flight itself was a test of the new engine and its success meant the crew had a reliable return craft. Since the craft was uncrewed, some biological samples for experiments were included on the flight.

Soyuz 32 was loaded with 130 kg of replaced instruments, processed materials, exposed film and other items with a total weight equal to that of the two cosmonauts. On 13 June, it undocked and returned to Earth uncrewed 295 km northwest of Dzhezkazgan. The craft was found to be in good condition. The next day, the crew redocked Soyuz 34 at the forward port to clear the aft port for Progress 7, a supply tanker.

On 19 August, the resident crew returned to earth in Soyuz 34, establishing a new space-endurance record of 175 days, surpassing the 139-day mission by the Soyuz 29 crew in 1978.
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