Encyclopedia Astronautica

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Demin, Lev Stepanovich (1926-1998) Russian engineer cosmonaut. Flew on Soyuz 15.

Graduated from Air Force Engineering Academy, Monino, Moscow Oblast, 1956 an received a doctorate degree in engineering, 1963. Colonel, Soviet Air Force Cosmonaut training January 1963 - 21 January 1965. Later he a deep-sea researcher. Alternate form of last name Dyomin.

Birth Place: Moscow, Moscow.
Status: Deceased.

Born: 1926.01.11.
Died: 1998.12.18.
Spaceflights: 1 .
Total time in space: 2.01 days.

More... - Chronology...

Associated Countries
See also
  • Cosmonaut Category of persons who have been trained for spaceflight in Russia. More...

Associated Flights
  • Soyuz A-1 Crew: Nikolayev, Demin. Planned Soyuz circumlunar mission. Soyuz would dock with a refuelled rocket stage and be accelerated on a loop around the moon. Cancelled in mid-1964 due to delays in Soyuz and decision to race Americans to moon landing. Backup crew: Shonin, Kugno. More...
  • Voskhod 4 Crew: Beregovoi, Katys. Planned second long-duration 20 day Voskhod flight. Cancelled in spring 1966 after near-disaster with Voskhod 2 and death of Korolev. Backup crew: Demin, Shatalov. More...
  • Soyuz (Almaz) 13 Crew: Demin, Sarafanov. Planned second crew to the first Almaz space station. Cancelled after the loss of control of Almaz OPS 1 (Salyut 2) in orbit. Backup crew: Rozhdestvensky, Zudov. More...
  • Soyuz 14 Crew: Artyukhin, Popovich. First military space station mission. Manned military reconnaissance of the earth's surface, assessing the fundamental value of such observations, and some supplemental medico-biological research. Backup crew: Demin, Sarafanov.Support crew: Rozhdestvensky, Volynov, Zholobov, Zudov. More...
  • Soyuz 15 Crew: Demin, Sarafanov. Second phase of manned operations aboard the Salyut 3 military space station, aborted when the Igla rendezvous system electronics failed and no docking was made. Backup crew: Volynov, Zholobov.Support crew: Rozhdestvensky, Zudov. More...

Associated Manufacturers and Agencies
Associated Programs
  • Almaz The only manned military space station to have ever flown, it served only to prove that manned stations provided no cost-effective substitute to unmanned military satellites. Derivatives of the design continue in service into the 21st Century as modules of the Salyut, Mir, and International Space Stations. More...

  • Becker, Joachim, "Space Facts Web Site", http://www.spacefacts.de/, Web Address when accessed: here.

Demin Chronology

1963 January 8 - .
1963 January 10 - .
1964 January 23 - .
1964 April 23 - .
  • Voskhod crews - . Nation: USSR. Related Persons: Bykovsky; Popovich; Titov; Volynov; Leonov; Khrunov; Belyayev; Komarov; Demin. Program: Voskhod. Flight: Voskhod 1. Spacecraft: Voskhod. Komarov has declared that nine cosmonauts are spaceflight-ready: Bykovsky, Popovich, Titov, Volynov, Leonov, Khrunov, Belyayev, Komarov, and Demin. One of these will command Voskhod, the other two seats will be occupied by a physician and an engineer or news correspondent. Kamanin is given only two to three months to prepare the passengers for spaceflight - something he reiterates is a dangerous adventure.

1964 June 20 - .
  • Voskhod sitting height limitation - . Nation: USSR. Related Persons: Katys; Benderov; Demin. Program: Voskhod. Flight: Voskhod 3. Spacecraft: Voskhod. It is discovered that three of the candidates for Voskhod flights cannot fit in the seats that will be fitted to the capsule. Katys and Benderov have sitting heights of 95 cm, and Demin, 98 cm. All of the rest are under the 90 cm limit. They will have to be removed from training.

1965 January 15 - .
  • Cosmonaut examinations - . Nation: USSR. Related Persons: Shatalov; Gubarev; Demin; Dobrovolsky; Pitskhelauri; Belyayev; Leonov; Khrunov; Zaikin; Gorbatko. Program: Voskhod. Flight: Voskhod 2. Spacecraft: Vostok. The 15 candidate-astronauts take their first phase examinations. 13 are rated outstanding, with Shatalov, Gubarev, and Demin doing the best. Two are rated only 'good' - Dobrovolskiy and Pitskherlauri. Dobrovolskiy was the worst, getting some answers completely wrong. For example, he said that the maximum thickness of Vostok's heat shield was 440 mm, when the correct answer was 140 mm; and identified Krug as a homing beacon on the search aircraft, rather than aboard the spacecraft. However overall everything went well, and all were considered to have passed. On this day Belyayev and Leonov complete their centrifuge training. Belyayev is 40 years old, and had little trouble with the centrifuge. Kamanin resolves to name Khrunov as a spacecraft commander in Belyayev's place, with a final crew being Khrunov-Leonov in case Belyayev cannot fly for some reason. Khrunov is available since Zaikin since the decision has been made to train Zaikin as Leonov's backup instead of Gorbatko.

1965 January 21 - .
  • Cosmonaut examinations completed - . Nation: USSR. Related Persons: Beregovoi; Shatalov; Gubarev; Demin; Keldysh; Korolev; Tyulin; Ponomaryova; Solovyova. The 15 cosmonaut candidates have all 'graduated' from basic cosmonaut training. The highest scores were by Beregovoi, Shatalov, Gubarev, and Demin. Two days later they officially receive their cosmonaut rating, bringing the total contingent to 34, of which 9 have already been in space. With this contingent the Soviet Union will fly to the moon and man an orbital station. That is insufficient - Kamanin wants a 40-man second contingent. The new contingent will have to be absolutely healthy male specimens, no older than 32 years, under 175 cm in height and 75 kg in weight. Keldysh, Korolev, and Tyulin are against further female flights in space, despite Kamanin's insistence.

1965 March 8 - .
  • Voskhod-2 departure - . Nation: USSR. Related Persons: Volynov; Beregovoi; Shatalov; Demin; Artyukhin; Katys; Voskresensky; Yaroshenko; Ivanov, I. Program: Voskhod. Flight: Voskhod 3. Spacecraft: Voskhod. The cosmonauts and VVS contingent prepare to depart to Baikonur - altogether 50 people on a single An-10 flight. Kamanin has started training a group of cosmonauts for the 15-day Voskhod-3 mission: Volynov, Beregovoi, Shatalov, Demin, and Artyukhin. Katys briefs Kamanin on his work together with Equipment Institute of the Academy of Sciences in preparing scientific experiments to be conducted on the next flight. Later Kamanin talks with his superiors about three candidates for future physician-cosmonaut missions. Voskresensky is the leading candidate. He specialises in research on the effects of zero-gravity on organisms, has published over thirty papers, and knows English. Yaroshenko is completing work on methods for conducting surgical operations in zero gravity. Ivanov conducts psychological studies on the impact of the spaceflight environment.

1965 April 2 - .
  • VVS role in space - . Nation: USSR. Related Persons: Belyayev; Leonov; Korolev; Brezhnev; Volynov; Katys; Beregovoi; Demin; Shatalov; Artyukhin; Rudenko; Tereshkova; Solovyova; Ponomaryova. Program: Voskhod; Lunar L1. Flight: Voskhod 3; Voskhod 4; Voskhod 5. Spacecraft: Soyuz A. Kamanin visits Korolev and tells him that in an upcoming meeting between the cosmonauts and Brezhnev and Kosygin, they are going to push for the VVS to be given a leading role in the exploration of space, including the necessity to improve the cosmonaut training centre with 8 to 10 simulators for Voskhod and Soyuz spacecraft, and development within the VVS of competence in space technology. Korolev is not opposed to this, but says he doubts the VVS leadership will support acquiring the new mission. Kamanin then indicates to Korolev his proposed crews for the upcoming Voskhod missions: Volynov-Katys, Beregovoi-Demin, Shatalov-Artyukhin. Kamanin hopes that Korolev will support Volynov as the prime candidate against Marshall Rudenko's favouring of Beregovoi. Kamanin then raises the delicate issue of Korolev's unfavourable opinion of Tereshkova. After her flight, Korolev angrily said: "I never want to have anything to do with these women again". Kamanin does not believe his remarks were meant seriously, and broaches the subject of training Soloyova and Ponomaryova for a female version of Leonov's spacewalk flight. Korolev says he will seriously consider the suggestion.

1965 April 13 - .
  • Voskhod crews - . Nation: USSR. Related Persons: Rudenko; Volynov; Katys; Beregovoi; Demin; Shatalov; Artyukhin; Solovyova; Ponomaryova; Khrunov; Gorbatko; Zaikin; Korolev; Keldysh; Vershinin. Program: Voskhod. Flight: Voskhod 3; Voskhod 4; Voskhod 5; Voskhod 6. Kamanin meets with Marshall Rudenko to present his cosmonaut crew plans. For the experimental gravity flight he proposes Volynov-Katys (prime crew), Beregovoi-Demin, and Shatalov-Artyukhin (back-up crew). Rudenko wants Beregovoi's as the first crew, but Kamanin, sensing the Marshall is unsure in his position, pushes for Volynov. He then presents his plan for the next Voskhod EVA mission: Solovyova and Ponomaryova as the female prime crew, Khrunov and Gorbatko, and Zaikin as the male back-up crew. Kamanin says he already has Korolev, Keldysh, and Vershinin behind this plan. But Rudenko says he will decide this later - he has to take his daughter to the hospital.

1965 April 17 - .
  • Voskhod plans - . Nation: USSR. Related Persons: Volynov; Katys; Beregovoi; Demin; Ponomaryova; Solovyova. Program: Voskhod. Flight: Voskhod 3; Voskhod 4; Voskhod 5. Despite opposition, Kamanin goes ahead with his plans. The 10-day duration artificial gravity flight is planned for October 1965, with Volynov and Katys as the crew. In the first half of 1966 Beregovoi and Demin will fly the long-duration mission, and Ponomaryova and Solovyova will fly an all-female spacewalk mission. However the Americans have announced they will fly a Gemini mission for a 7 to 8 day duration by the end of the year; the Soviets may have to adjust this plan to ensure that they retain the lead in manned spaceflight. Kamanin has told the female cosmonauts of their planned flight, but also warned them there is serious opposition in some quarters.

1965 August 20 - .
  • Soyuz crews - . Nation: USSR. Related Persons: Korolev; Gagarin; Nikolayev; Bykovsky; Komarov; Artyukhin; Demin; Feoktistov; Volynov; Katys; Beregovoi. Program: Voskhod; Soyuz; Lunar L1. Flight: Soyuz 1; Soyuz 2A; Soyuz s/n 3/4; Soyuz 7K-L1 mission 1; Soyuz 7K-L1 mission 2. Spacecraft: Voskhod; Soyuz 7K-L1. Kamanin calls Korolev, finds he is suffering from very low blood pressure (100/60). Kamanin suggests that candidates for the commander position in the first two Soyuz missions would be Gagarin, Nikolayev, Bykovsky, or Komarov. Korolev agrees basically, but says that he sees Bykovsky and Nikolayev as candidates for the first manned lunar flyby shots. Kamanin suggests Artyukhin and Demin for the engineer-cosmonaut role on the first Soyuz flights, but Korolev disagrees, saying Feoktistov has to be aboard. However Korolev agrees with Kamanin's selection for the next Voskhod flight - Volynov/Katys as prime crew, Beregovoi/Demin as backups. Later Kamanin corresponds with Stroev over modification of an Mi-4 helicopter as a lunar lander simulator.

1966 August 10 - .
  • Soyuz schedule has been delayed again - . Nation: USSR. Related Persons: Mishin; Demin; Tereshkova; Gagarin; Tyulin. Program: Soyuz. Flight: Soyuz 1; Soyuz 2A; Soyuz s/n 3/4; Soyuz s/n 5/6. Spacecraft: Soyuz 7K-OK. Soyuz s/n 1 and 2 will be flown unpiloted by October 1966 Manned flights aboard Soyuz s/n 3, 4, 5, 6 will not take place until the first quarter of 1967. Later Mishin tours the cosmonaut training centre - the first time in his life he has visited the place. Mishin admires the new construction from Demin's balcony on the 11th floor of cosmonaut dormitory, then goes to Tereshkova's apartment on the seventh floor, and then Gagarin's apartment. Mishin insists on drinking a toast of cognac on each visit. Tyulin reveals this is a peace mission - they want to normalize relations and get on with cosmonaut training. At Fedosiya the auxiliary parachute of a Soyuz capsule failed to open during a drop test. Kamanin believes that the Soyuz parachute system is even worse than that of Vostok. His overall impression of the Soyuz is poor: the entire spacecraft looks unimpressive. The small dimensions of hatch, antiquated communication equipment, and inadequate emergency recovery systems are only the most noticeable of many discrepancies. If the automatic docking system does not function, then the entire Soviet space program will collapse in failure.

1967 Autumn - .
1966 September 2 - .
1973 August - .
1974 July 3 - . 18:51 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC1. LV Family: R-7. Launch Vehicle: Soyuz 11A511.
  • Soyuz 14 - . Call Sign: Berkut (Golden Eagle ). Crew: Artyukhin; Popovich. Backup Crew: Demin; Sarafanov. Support Crew: Rozhdestvensky; Volynov; Zholobov; Zudov. Payload: Soyuz 7K-T(A9) s/n 62. Mass: 6,800 kg (14,900 lb). Nation: USSR. Related Persons: Artyukhin; Popovich; Demin; Sarafanov; Rozhdestvensky; Volynov; Zholobov; Zudov. Agency: MOM. Program: Almaz. Class: Manned. Type: Manned spacecraft. Flight: Soyuz 14. Spacecraft: Soyuz 7K-T/A9. Duration: 15.73 days. Decay Date: 1974-07-19 . USAF Sat Cat: 7361 . COSPAR: 1974-051A. Apogee: 217 km (134 mi). Perigee: 195 km (121 mi). Inclination: 51.6000 deg. Period: 88.60 min. On 4 July Soyuz 14 docked with the Salyut 3 space station after 15 revolutions of the earth. The planned experimental program included manned military reconnaissance of the earth's surface, assessing the fundamental value of such observations, and some supplemental medico-biological research. After the crew's return research continued in the development of the on-board systems and the principles of remote control of such a station.

1974 August 26 - . 19:58 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC1. LV Family: R-7. Launch Vehicle: Soyuz 11A511.
  • Soyuz 15 - . Call Sign: Duna (Danube ). Crew: Demin; Sarafanov. Backup Crew: Volynov; Zholobov. Support Crew: Rozhdestvensky; Zudov. Payload: Soyuz 7K-T(A9) s/n 63. Mass: 6,760 kg (14,900 lb). Nation: USSR. Related Persons: Demin; Sarafanov; Volynov; Zholobov; Rozhdestvensky; Zudov. Agency: MOM. Program: Almaz. Class: Manned. Type: Manned spacecraft. Flight: Soyuz 15. Spacecraft: Soyuz 7K-T/A9. Duration: 2.01 days. Decay Date: 1974-08-28 . USAF Sat Cat: 7421 . COSPAR: 1974-067A. Apogee: 236 km (146 mi). Perigee: 173 km (107 mi). Inclination: 51.6000 deg. Period: 88.50 min. Soyuz 15 was to conduct the second phase of manned operations aboard the Salyut 3 military space station, but the Igla rendezvous system failed and no docking was made. The two day flight could only be characterised as '... research in manoeuvring and docking with the OPS in various modes, and development of methods for evacuation and landing from space complex in new conditions....'

    As Chelomei had complained, Soyuz had no reserves or backup systems for repeated manual docking attempts and had to be recovered after a two-day flight. The state commission found that the Igla docking system of the Soyuz needed serious modification. This could not be completed before Salyut 3 decayed. Therefore the planned Soyuz 16 spacecraft became excess to the program (it was later flown as Soyuz 20 to a civilian Salyut station, even though over its two year rated storage life).

    Officially: Conduct of joint experiments with the Salyut-3 orbital scientific station.

1974 August 28 - .
1974 August 31 - .
  • Cosmonaut reunion as Soyuz 15 crew arrives in Moscow. - . Nation: USSR. Related Persons: Demin; Glushko; Mishin; Keldysh; Smirnov; Ustinov. Program: Salyut. Flight: Soyuz 15. Kamanin attends a reunion of cosmonauts on the occasion of the arrival of the Soyuz 15 crew at Chkalovsky Airfield. Demin has flown at the age of 48, the oldest astronaut ever, until Slayton makes his flight. Kamanin talks to Glushko and learns that the N1 has finally been cancelled. The misbegotten project went for eight years only because of the unconditional support of Mishin by Keldysh, Smirnov, and Ustinov. The earliest Soviet lunar landing cannot occur earlier than the Tenth Five Year Plan (e.g. 1980). Kamanin learns that Soyuz 15 was supposed to be a thirty-day flight, but the Igla automatic docking system failed yet again.

1998 December 18 - .
  • Cosmonaut Lev Stepanovich Demin dies at age of 72 -- Natural causes. - . Nation: Russia. Related Persons: Demin. Summary: Russian engineer cosmonaut. Flew on Soyuz 15..

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