Encyclopedia Astronautica
Soyuz 12 / DOS 1


Crew: Kolodin, Leonov, Rukavishnikov. If the Soyuz 11 crew had not perished during return to the earth, the Leonov crew would have been sent for a second visit to the Salyut 1 space station. A 30-day mission duration was planned. Backup crew: Gubarev, Sevastyanov, Voronov.

If the Soyuz 11 crew had not perished during return to the earth, the Leonov crew would have been sent for a second visit to the Salyut 1 space station. A 30-day mission duration was planned.

First Launch: 1971 July 15-20.

More... - Chronology...


Associated People
  • Voronov Voronov, Anatoli Fyodorovich (1930-1993) Russian navigator cosmonaut, 1963-1979. More...
  • Kolodin Kolodin, Pyotr Ivanovich (1930-) Russian engineer cosmonaut, 1963-1983. More...
  • Gubarev Gubarev, Aleksey Aleksandrovich (1931-) Russian pilot cosmonaut. Flew on Soyuz 17, Salyut 6 EP-2. More...
  • Rukavishnikov Rukavishnikov, Nikolai Nikolayevich (1932-2002) Russian engineer cosmonaut. Flew on Soyuz 10, Soyuz 16, Salyut 6 EP-5-1. More...
  • Leonov Leonov, Aleksei Arkhipovich (1934-) Russian pilot cosmonaut. First person to walk in space. Flew on Voskhod 2, Soyuz 19 (ASTP). Cancelled missions included command of first Soviet circumlunar flight in 1969 and first military space station mission in 1973. More...
  • Sevastyanov Sevastyanov, Vitali Ivanovich (1935-2010) Russian engineer cosmonaut. Flew on Soyuz 9, Soyuz 18. More...

See also
Associated Programs
  • Salyut The world's first space station, developed in one year by the Soviet Union on the basis of Chelomei's Almaz station, in an attempt to upstage the American Skylab after the loss of the moon landing race to the Americans. More...

Soyuz 12 / DOS 1 Chronology


1970 May 6 - .
1971 March 2 - .
1971 March 3 - .
  • Soviet of Chief Designers. - . Nation: USSR. Related Persons: Mishin; Glushko. Program: Salyut. Flight: Soyuz 10; Soyuz 11; Soyuz 12 / DOS 1. Spacecraft: Salyut 1; Soyuz 7KT-OK. DOS-7K #1 completed its factory testing on 3 March. Checkout at Baikonur is to be completed by 9 April, and launch is scheduled for 15 April. The first crew to the station will be launched aboard a Soyuz on 18-20 April. Remaining items to be cleared:
    • Vibration qualification test of the station test article are not complete. They will only begin on 5 March and will take two months using 3-shift work. Mishin wants the preliminary results on 20 March.
    • Four complete Igla systems are required. Five have been completed and are working satisfactorily.
    • The expiration date on the parachute installed in the Soyuz 10 capsule is 15 April. It will have to be repacked before the flight.
    • There were numerous failures in the first phase of environmental control system qualification tests. They have to be repaired before the second phase can even be started.
    • Mishin wants the first crew to stay on the station for 30 days, the second crew 45 days. Glushko and the doctors say this is a grave risk.

1971 March 5 - .
  • Launch of DOS#1 is set for 15 April. - . Nation: USSR. Related Persons: Smirnov; Serbin; Mishin; Shonin. Program: Salyut. Flight: Soyuz 10; Soyuz 11; Soyuz 12 / DOS 1. Spacecraft: Salyut 1. Kamanin is still fighting the issue of mission length - he doesn't want to risk lives. Soyuz 9 landed virtually in the laps of the doctors, but what if they had made an emergency landing in the ocean, or taiga? They were in no condition to save themselves before assistance arrived. Every day over 20-22 days is a risk to the life of the crew, in Kamanin's view. Smirnov, Serbin, Mishin - they don't care about this.

    Meanwhile the doctor's verdict is in on Shonin. He is to be sent to a sanatorium for rehabilitation.


1971 March 6 - .
  • Space Plan for 1971 unrealistic. - . Nation: USSR. Program: Salyut; Almaz. Flight: Soyuz 10; Soyuz 11; Soyuz 12 / DOS 1. Spacecraft: Salyut 1; Almaz OPS; TKS; Spiral OS. The space plan for 1971 has finally been approved. There are to be three space stations launched, manned by ten Soyuz launches and a total of over 12 different crewmembers in space during the year. But it is clear to Kamanin that the second DOS and first Almaz station will not really be ready this year. And there won't be more than two Soyuz and two TKS transports available by the end of the year. Ranazomov says that Chelomei's TKS, being designed to fly to the Almaz, will cover many of he same requirements of the Spiral spaceplane. He proposes that Mikoyan should collaborate with Chelomei on Spiral. Meanwhile simulators at TsPK remain underfunded.

1971 March 9 - .
  • Major DOS training exercise by first crew. - . Nation: USSR. Related Persons: Shatalov; Yeliseyev; Rukavishnikov; Anders. Program: Salyut. Flight: Soyuz 10; Soyuz 11; Soyuz 12 / DOS 1. Spacecraft: Salyut 1. A major training session is held with Shatalov, Yeliseyev, and Rukavishnikov. They make a 15 hour simulated 'flight' aboard the DOS trainer from 09:15 to 22:45. All operations expected in a thirty-day mission to the station are gone through. This includes simulation of emergencies to test the reactions of both the crew and ground controllers. Kamanin receives a letter from Anders, thanking him for the tour of Star City. Representatives from the Swedish firm are in town to negotiate the contract for the TsF-18 18-metre radius centrifuge. Both Korolev and Mishin fought against the VVS getting such a centrifuge.

1971 March 11 - .
1971 March 15 - .
  • Major DOS training exercise by third crew. - . Nation: USSR. Related Persons: Dobrovolsky; Volkov; Patsayev; Shatalov; Yeliseyev; Sevastyanov. Program: Salyut. Flight: Soyuz 10; Soyuz 11; Soyuz 12 / DOS 1. Spacecraft: Salyut 1. The third, back-up DOS crew of Dobrovolsky, Volkov and Patsayev train in the DOS trainer. All of the crews have made good runs, with no mistakes or failures. Shatalov, after training on the DOS simulator, now supports Mishin's 30 day flight approach. He has also talked to Yeliseyev and Sevastyanov about the matter. He believes there may be a very different reaction to zero-G from individual to individual, and the Soyuz 9 crew may have been the wrong two individuals.

1971 March 17 - .
1971 March 19 - .
  • State Commission for Launch of DOS#1. - . Nation: USSR. Related Persons: Mishin. Program: Salyut. Flight: Soyuz 10; Soyuz 11; Soyuz 12 / DOS 1. Spacecraft: Salyut 1. Summary: The VVS insists that the Soyuz 10 crew land in daylight. Mishin says that in order that the crew can land in daylight at the end of the 30-day mission, the spacecraft must be launched at 03:00 at night. Kamanin believes this also to be unsafe..

1971 March 20 - .
  • DOS crews arrives in Baikonur. - . Nation: USSR. Related Persons: Shatalov; Yeliseyev; Dobrovolsky; Patsayev; Volkov; Kolodin; Leonov; Rukavishnikov. Program: Salyut. Flight: Soyuz 10; Soyuz 11; Soyuz 12 / DOS 1. Spacecraft: Salyut 1. Shatalov's crew arrived at 09:00 aboard a Tu-104 and were ensconced in Room 14 of the Hotel Kosmonavt. Two further Tu-104's arrived 20 and 30 minutes later with the second and third crews. At 18:00 they all went to the MIK assembly hall to view the two Soyuz spacecraft and the station. There were electrical problems with the station, and they finally returned to the hotel at 24:00 without the problem having been resolved. Kamanin notes two films are to be screened tomorrow - a Bulgarian movie and the Soviet film 'Diplomat'.

1971 March 21 - .
  • DOS communications tests at Baikonur - . Nation: USSR. Program: Salyut. Flight: Soyuz 10; Soyuz 11; Soyuz 12 / DOS 1. Spacecraft: Salyut 1; Penguin. Due to problems with the electrical system aboard the station, the crews are unable to start their training aboard the actual station until 22:00. So after breakfast they work on their flight plans and logs and test the training suits to be used on this flight for the first time. This includes the Penguin suit which has elastic bands sewn into it to simulate the strain of gravity. At 17:00 the crews go to the MIK and start communications tests on the DOS. All proceeds normally. On the bus back, the crews discuss the new tracking ship Yuri Gagarin. It has a displacement of 45,000 tonnes and cost 120 million roubles. It will expand the time communications are possible with the ground during the long station flight.

1971 March 22 - .
  • Problems with Igla system on DOS. - . Nation: USSR. Related Persons: Shabarov; Mishin. Program: Salyut. Flight: Soyuz 10; Soyuz 11; Soyuz 12 / DOS 1. Spacecraft: Salyut 1. There are problems with the Igla rendezvous system and also the stabilisation systems aboard DOS#1. The April 15 launch date is not realistic, according to Shabarov's deputies, although he himself says he can still meet the schedule. From 12:00 to 16:00 the cosmonauts participate in communications tests between the Soyuz spacecraft and the station. They go all right, but there are many problems with the ground segment. Mishin arrives in the evening. He has to give the VPK the final word on 27 March as to the launch date for the station. Shabarov is afraid to tell Mishin about the problems they are having with the Igla system.

1971 March 23 - .
  • Cosmonauts return to Moscow from Tyuratam. - . Nation: USSR. Related Persons: Shatalov; Yeliseyev; Dobrovolsky; Patsayev; Volkov; Kolodin; Leonov; Rukavishnikov. Program: Salyut. Flight: Soyuz 10; Soyuz 11; Soyuz 12 / DOS 1. A four-story school burned down the previous night in Leninsk. The cosmonauts and space centre technicians watched the USA-USSR ice hockey match, which went from 23:00 until 02:00 the next morning. Kamanin returns to Moscow aboard a Tu-104. Aboard the flight the political intrigues surrounding selection of Kamanin's deputy are discussed.

1971 March 25 - .
  • DOS#1 Launch Commission. - . Nation: USSR. Program: Salyut. Flight: Soyuz 10; Soyuz 11; Soyuz 12 / DOS 1. Spacecraft: Salyut 1. The launch date, time, and first mission duration are debated. The VVS specialists now say a night landing by a Soyuz is acceptable from a safety point of view. Only two months earlier they were rejecting the possibility - these are people without principles, in Kamanin's view. He believes the crew's lives will be at risk with the planned thirty day flight duration.

1971 March 26 - .
  • VPK meets at the Kremlin. - . Nation: USSR. Program: Salyut. Flight: Soyuz 10; Soyuz 11; Soyuz 12 / DOS 1. Spacecraft: Salyut 1. The launch of DOS#1 is set for 15-20 April. The first crew will launch three days later on a thirty-day mission. 25 days after they return to earth the second crew will be launched. That crew will stay aboard for 30 to 45 days. The spaceships and crews are declared ready for both missions.

1971 April 6 - .
1971 April 7 - .
  • DOS crew commanders inspect completed DOS#1 station. - . Nation: USSR. Related Persons: Shatalov; Leonov; Dobrovolsky. Program: Salyut. Flight: Soyuz 10; Soyuz 11; Soyuz 12 / DOS 1. Spacecraft: Salyut 1. Shatalov, Leonov, and Dobrovolsky are all working hard on final preparations for DOS-7K. The station is fully complete. Only small defects have been noted. This is the first look by the crews at their future home in space in its fully completed version. On the bus back to the hotel the cosmonauts discuss the poor quality and inedibility of 'space food'.

1971 April 8 - .
  • Soyuz 10 crew preparations. - . Nation: USSR. Related Persons: Shatalov; Yeliseyev; Rukavishnikov. Program: Salyut. Flight: Soyuz 10; Soyuz 11; Soyuz 12 / DOS 1. Summary: The DOS cosmonauts are working on their flight plans/logs at Area 17. Kamanin discusses the physical training of crews for long missions with Stepanov. They must do thirty minutes of vigorous exercise per day..

1971 April 9 - .
  • State Commission meets at new MIK. - . Nation: USSR. Related Persons: Shatalov; Yeliseyev; Rukavishnikov. Program: Salyut. Flight: Soyuz 10; Soyuz 11; Soyuz 12 / DOS 1. DOS-7K#1 will be ready on 19 April. The first crew is completely trained. During the day the engineers of the second and third crews train aboard the station. Afterwards the technicians fix the defects they have noted. The evening film is 'Beginning'. There are many high-level guests at Area 2. After the film the brass try out the training machines that will be used aboard the station - they tire quickly.

1971 April 11 - .
1971 April 14 - .
  • Salyut 1 cleared for roll-out. - . Nation: USSR. Related Persons: Beregovoi; Mishin; Chelomei; Grechko, Andrei. Program: Salyut. Flight: Soyuz 10; Soyuz 11; Soyuz 12 / DOS 1. Spacecraft: Salyut 1. Marshal Grechko has sent a telegram to Kamanin, informing him that the Gagarin Cosmonaut Training Centre has received the Order of Lenin. The UR-500K booster is mated to space station DOS-7K#1. Chelomei is ill. Mishin takes the opportunity to insult him by replacing Chelomei with Mishin's man on the commission that will judge the UR-500's readiness for launch. Nevertheless, the commission clears the booster to be moved out to the pad on 15 April, with launch set for 19 April at 06:40. In the evening Beregovoi's 50th birthday is celebrated.

1971 April 15 - .
  • Salyut 1 erected on pad. - . Nation: USSR. Related Persons: Shatalov; Yeliseyev; Rukavishnikov; Mishin. Program: Salyut. Flight: Soyuz 10; Soyuz 11; Soyuz 12 / DOS 1. Spacecraft: Salyut 1. The Proton booster is erected on the pad. The decision is made to proceed despite a prediction of 15 m/s winds -- the prediction turns out to be wrong. All of the big brass are present for the rollout. Afterwards Mishin visits the cosmonauts. He says all is ready for the first space station mission, and promises them the N1-L3 will be available soon for lunar missions.

1971 April 19 - . 01:40 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC81/24. LV Family: Proton. Launch Vehicle: Proton-K. LV Configuration: Proton-K 254-01.
  • Salyut 1 - . Payload: Zarya s/n 121. Mass: 18,500 kg (40,700 lb). Nation: USSR. Agency: MOM. Program: Salyut. Class: Manned. Type: Manned space station. Flight: Soyuz 10; Soyuz 11; Soyuz 12 / DOS 1. Spacecraft: Salyut 1. Duration: 179.93 days. Decay Date: 1971-10-11 . USAF Sat Cat: 5160 . COSPAR: 1971-032A. Apogee: 214 km (132 mi). Perigee: 180 km (110 mi). Inclination: 51.4000 deg. Period: 88.50 min. First manned space station. Salyut 1 included a number of military experiments, including the OD-4 optical visual ranger, the Orion ultraviolet instrument for characterising rocket plumes, and the highly classified Svinets radiometer. Primary objectives included photography of the earth, spectrographs of the earth's horizon, experiments with intense gamma rays, and studying manual methods for station orientation.

    At 05:20 the State Commission and their guests arrive at the Area 95 observation point to view the launch. The booster takes off on schedule at 06:40 in light rain and 60 km/hr wind. The tracking station reports good orbital insertion, separation from the third stage, and antennae and solar panel deployment. But the cover of the scientific equipment bay does not separate. This will mean that many experiments cannot be accomplished. It is decided to launch the crew to the station anyway, since the station is otherwise functioning normally. The cosmonauts go to the baths in the evening. Additional Details: here....


1971 April 20 - .
  • DOS State Commission. - . Nation: USSR. Program: Salyut. Flight: Soyuz 10; Soyuz 11; Soyuz 12 / DOS 1. Spacecraft: Salyut 1. Six of eight fans in the ECS have failed. There are only two back-ups, which are not enough for the 90-day active mission life planed. But it is decided the problem could actually be failed sensors, and in any case the first crew can easily repair the fans. At 17:00 the State Commission meets publicly (radio and television coverage) to approve the launch of Soyuz 10. Launch is set for 22 April at 03:30.

1971 May 8 - .
  • Soyuz 11 / Soyuz 12 plans. - . Nation: USSR. Related Persons: Mishin. Program: Salyut. Flight: Soyuz 10; Soyuz 11; Soyuz 12 / DOS 1. Spacecraft: Soyuz 7KT-OK; Salyut 1. Frolov reports to Kamanin on a meeting of the general designers. Mishin has planned the Soyuz 11 launch for June, to be followed by Soyuz 12 in July. The reworked docking mechanism will be ready for installation on Soyuz 11 by 18 May. Mishin recommends a full automated docking for the next mission.

1971 May 12 - .
  • VPK Meeting on Soyuz 11/12. - . Nation: USSR. Related Persons: Smirnov; Mishin; Kutakhov. Program: Salyut. Flight: Soyuz 11; Soyuz 12 / DOS 1. Spacecraft: Soyuz 7KT-OK; Salyut 1. Mishin guarantees to Smirnov that Soyuz 11 will be able to dock to Salyut 1. He also promises thirty-day missions for both Soyuz 11 and Soyuz 12. But there is a problem with this last promise -- Soyuz 12 won't launch until 15-18 July, which will be after the guaranteed life of the Salyut 1 station. Kamanin protests the decision. Smirnov points out that they must fulfil the resolutions of the Communist Party without question. But he reassures Kamanin that they will take everything one step at a time, keeping the safety of the crew in mind. Kutakhov also does not support the decision, but orders must be followed.

1971 May 21 - .
  • Soyuz 11 crews arrive at Tyuratam. - . Nation: USSR. Program: Salyut. Flight: Soyuz 11; Soyuz 12 / DOS 1. Spacecraft: Soyuz 7KT-OK; Salyut 1. The Salyut crews arrive at Tyuratam and see the new reinforced docking system for the first time. Then they go to Area 2 to prepare their flight plans. Aferwards they train from 20:00 to 24:00 aboard Soyuz 11. But due to the parallel work on revising the Igla system, the systems are not all updated yet. The cosmonauts have no confidence in the new system, and can only say they 'probably' have a better chance of success in docking than before.

1971 May 28 - .
1971 May 31 - .
  • Problems with Salyut station atmosphere. - . Nation: USSR. Related Persons: Feoktistov; Dobrovolsky; Patsayev; Volkov; Kolodin; Leonov; Rukavishnikov. Program: Salyut. Flight: Soyuz 11; Soyuz 12 / DOS 1. Spacecraft: Salyut 1. Kamanin is advised that the atmosphere aboard Salyut 1 is now all right. He finds the news disturbing, since he was not informed until then that there was a problem! Feoktistov outlines the modifications made to Soyuz 11 compared to Soyuz 10 to the cosmonauts. The reinforcement of the docking ring system has added 10 kg to the spacecraft. Consumables are carried that increase the time for autonomous flight from three to four days.

1971 June 1 - .
1971 June 2 - .
  • Contingency planning for Soyuz 11. - . Nation: USSR. Related Persons: Dobrovolsky; Patsayev; Volkov; Kolodin; Leonov; Rukavishnikov. Program: Salyut. Flight: Soyuz 11; Soyuz 12 / DOS 1. Spacecraft: Soyuz 7KT-OK. From 09:00 to 13:00 the Soyuz 11 cosmonauts and engineers discuss the best approaches for docking, contingency plans, and so on. A concrete solution is provided for every possible problem they might encounter aboard the station - bad air, water contaminated, stuck exit hatch, and so on.

1971 June 3 - .
  • Kubasov found not fit to fly aboard Soyuz 11. - . Nation: USSR. Related Persons: Dobrovolsky; Patsayev; Volkov; Kolodin; Leonov; Rukavishnikov; Mishin. Program: Salyut. Flight: Soyuz 11; Soyuz 12 / DOS 1. The cosmonauts play tennis in the morning. There are two dysentery cases in the staff at Area 2. Contact between the officers and workers at the centre is minimised. The Soyuz 11 crew undergoes their final medical checkups. A spot is found on Kubasov's lung in the x-ray. The doctors say it is the beginning of tuberculosis, and prohibit him from flying in space! Mishin, backed by Moscow, says that under mission rules, this means the Dobrovolsky back-up crew will have to fly in place of Leonov's crew. Kamanin feels uncomfortable with the decision, but can make no good argument for his preference - just replacing Kubasov on Leonov's crew with Volkov. The Launch Commission decides that Soyuz 11 is to be rolled out to the pad at 06:00 on 4 June, with launch at 07:39 on 6 June, with Dobrovolsky's crew aboard.

1971 June 4 - .
  • Backup crew named to fly Soyuz 11 - . Nation: USSR. Related Persons: Dobrovolsky; Patsayev; Volkov; Kolodin; Leonov; Rukavishnikov; Mishin. Program: Salyut. Flight: Soyuz 11; Soyuz 12 / DOS 1. Soyuz 11 is on the launch pad, and which crew will fly is still being argued. Kamanin wants to simply have Volkov replace Kubasov on Leonov's crew. Mishin wants the complete backup crew to replace Leonov's crew. Others on the launch commission support Mishin. At 15:30 a team of physicians arrive from Moscow to verify the diagnosis of Kubasov. At 18:00 the final state commission meeting confirms the Dobrovolsky crew. At 19:00 a press conference is held - Dobrovolsky, Patsayev, and Volkov are publicly presented as the crew of Soyuz 11.

1971 June 5 - .
  • Leonov crew fights to be put back aboard Soyuz 11. - . Nation: USSR. Related Persons: Dobrovolsky; Patsayev; Volkov; Kolodin; Leonov; Rukavishnikov; Krylov. Program: Salyut. Flight: Soyuz 11; Soyuz 12 / DOS 1. Leonov and his crew meet with Kamanin at 10:00 and argue against flying the back-up crew. Kamanin tells him that they are not reacting in a correct manner to the decision. Afterwards Kamanin meets with Krylov at Area 17 to discuss the planned new three-story hotel, which will finally include some sports training facilities for the cosmonauts. By the evening ten VVS generals have arrived to see the launch -- no more than 2 or 3 really need to be there.

1971 June 9 - .
  • Soyuz 11 Day 4 - . Nation: USSR. Related Persons: Dobrovolsky; Patsayev; Volkov. Program: Salyut. Flight: Soyuz 11; Soyuz 12 / DOS 1. All continues normal aboard the station. Television sessions are held with the crew. They have now put on their training suits, and are urged to do regular physical training as required by the program. There are enough ECS consumables, fuel, water, and food aboard for the station to continue in manned operation until 20 August. The return of he Soyuz 11 crew is planned for 30 June, with launch of Soyuz 12 on 20 July. The first of the daily landing commission meetings is held. Emergency landing sites and procedures for the following day are discussed and set.

1971 June 15 - .
1971 June 18 - .
  • Soyuz 11 Day 13 - . Nation: USSR. Related Persons: Dobrovolsky; Patsayev; Volkov; Mishin. Program: Salyut. Flight: Soyuz 11; Soyuz 12 / DOS 1. Spacecraft: Salyut 1. The crew makes a five minute television transmission. The telescope in the background produces dissonance in the image. Kamanin calls Mishin at Tyuratam, where the N1 is being prepared for launch. There are delays, and the launch must be moved back two days to 22 June. Kamanin tells the crews that this means there will be no good opportunity for them to observe the launch from the station with the Svinets apparatus, as was planned. Meanwhile the electrical specialists and Chertok in Moscow cannot localise the electrical problem. All of the equipment aboard has been turned off and on, and the burning simply does not occur again. Meanwhile there are concerns that Soyuz 11 may be able to reach the desired mission length, but that Soyuz 12 may not be safe to fly by its launch date. The mission is still planned for the full 30 days, but the physical training program has not been followed due to the problems and breakdowns aboard the station, requiring the cosmonauts to spend a lot of time in unplanned repair activities. The physicians are not in favour of prolonging the flight.

1971 August - .
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