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Salyut 4

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Salyut 4
Salyut 4 space station at RKK Energia Museum
Credit: © Mark Wade

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AKA: 11F715;17K s/n 124. Status: Operational 1973. First Launch: 1973-05-11. Last Launch: 1974-12-26. Number: 2 . Thrust: 4.09 kN (919 lbf). Gross mass: 18,210 kg (40,140 lb). Unfuelled mass: 16,210 kg (35,730 lb). Specific impulse: 282 s. Height: 13.07 m (42.88 ft). Span: 17.00 m (55.00 ft).

DOS-1 was launched as Salyut 1 on 19 April 1971. The triumph turned to tragedy when the Soyuz-11 crew died due to de-pressurization of their re-entry capsule during return to the earth. Launches of the first series DOS stations continued in a desperate effort to beat Skylab into orbit with a fully successful Soviet space station mission. DOS-2, s/n 122, was destroyed in a launch vehicle explosion en route to orbit in July 1972. DOS-3, s/n 123, reached orbit as Cosmos 557 in 1973 but control was lost before a crew could be sent to the station. DOS-4, the last of the first series, finally flew successfully as Salyut 4 in 1974. Salyut 4 differed from Salyut 1 in having three sets or rotatable solar panels, more electrical power, and a more complete equipment suite.

Salyut 4 represented the second phase of DOS civilian space station. It had 2,000 kg of scientific equipment and two sets of 3 solar panels. It was equipped with the Delta navigation system. Experiments: - Solar telescope OST-1 with main mirror of 25 cm diameter, 2.5 m focal length, built by Crimean Astrophysical Observatory with spectrograph shortwave diffraction spectrometer for far ultraviolet emissions, oriented by maneuvering entire station - two X-ray telescopes - swivel chair for vestibular function tests - lower body negative pressure gear for cardiovascular studies - bicycle ergometer integrated physical trainer (electrically driven running track 1 m X .3 m with elastic cords providing 50 kg load) - penguin suits and alternate athletic suit - 15 medical experiments total - sensors for temperature and characteristics of upper atmosphere ITS-K infrared telescope spectrometer and ultraviolet spectrometer for study of earth's infrared radiation - multispectral earth resources camera - cosmic ray detector - embryological studies - new engineering instruments tested for orientation of station by celestial objects and in darkness - New autonomous navigation system calculates orbital elements without assistance from ground - teletypewriter - two spherical airlocks near main camera to ejects body wastes. Interior floor area: 34.8 sq. m

RCS Coarse No x Thrust: Verniers: 4 X 98 N - Pitch: 2 X 59 N - Yaw: 2 X 59 N - Roll: 2 X 20 N. RCS Fine No x Thrust: 18 x 10 N. RCS Coarse Backup No x Thrust: 4 x 98 N. Spacecraft delta v: 320 m/s (1,040 ft/sec). Electric System: 2.00 average kW.

Photo Gallery

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Salyut 4 in Assembly Salyut 4 in Assembly Hall Credit: RKK Energia

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Salyut 4 toilet View of Salyut 4 toilet facility - you always wanted to know how they do it in space... Credit: © Mark Wade

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Salyut 4 panel Close-up of Salyut 4 propellant system control panel Credit: © Mark Wade

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Salyut 4 Main Panel Salyut 4 Main Control Panel - adopted unchanged from Soyuz 7K-OK Credit: © Mark Wade

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Salyut 4 panel Salyut 4 Control Panel - above and to the right of the main station control panel Credit: © Mark Wade

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Salyut 4 rear int. Salyut 4 view of rear interior of station Credit: © Mark Wade

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Salyut 4 airlock Salyut 4 airlock compartment Credit: © Mark Wade

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Interior of Salyut 4 Interior of Salyut 4 looking forward. Credit: © Mark Wade

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Salyut 4 Salyut 4 - Soyuz 17

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Salyut 4 Credit: © Mark Wade

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Salyut 6 Salyut 6 as displayed in Moscow in 1981. Credit: © Mark Wade

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Salyut 4 Credit: Manufacturer Image

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• Cosmos 557 - . Payload: Zarya s/n 123. Mass: 19,400 kg (42,700 lb). Nation: Russia. Agency: MOM. Program: Salyut. Class: Manned. Type: Manned space station. Spacecraft Bus: Almaz. Spacecraft: Salyut 4. Duration: 10.98 days. Decay Date: 1973-05-22 . USAF Sat Cat: 6498 . COSPAR: 1973-026A. Apogee: 225 km (139 mi). Perigee: 206 km (128 mi). Inclination: 51.60 deg. Period: 88.90 min. Salyut failure. Unsuccessful mission. Salyut out of control. Decayed May 22, 1973. Was to have been manned by initial crew of Leonov and Kubasov. Last chance to upstage Skylab, launched three days later..

• Salyut 4 - . Payload: Zarya s/n 124. Mass: 18,500 kg (40,700 lb). Nation: Russia. Agency: MOM. Program: Salyut. Class: Manned. Type: Manned space station. Spacecraft Bus: Almaz. Spacecraft: Salyut 4. Duration: 768.82 days. Decay Date: 1977-02-02 . USAF Sat Cat: 7591 . COSPAR: 1974-104A. Apogee: 251 km (155 mi). Perigee: 212 km (131 mi). Inclination: 51.60 deg. Period: 89.10 min.

  Deorbited February 2, 1977.
  Maneuver Summary:
  211km X 250km orbit to 215km X 286km orbit. Delta V: 11 m/s
  211km X 284km orbit to 276km X 344km orbit. Delta V: 35 m/s
  277km X 342km orbit to 338km X 351km orbit. Delta V: 19 m/s
  330km X 340km orbit to 337km X 350km orbit. Delta V: 4 m/s
  337km X 349km orbit to 339km X 351km orbit. Delta V: 1 m/s
  332km X 348km orbit to 348km X 355km orbit. Delta V: 6 m/s
  347km X 354km orbit to 343km X 351km orbit. Delta V: 1 m/s
  335km X 344km orbit to 335km X 360km orbit. Delta V: 4 m/s
  335km X 360km orbit to 342km X 361km orbit. Delta V: 2 m/s
  330km X 351km orbit to 344km X 353km orbit. Delta V: 4 m/s
  186km X 187km orbit to 90km X 186km orbit. Delta V: 28 m/s
  Total Delta V: 87/115 m/s.
  Officially: Further testing of station design, on-board systems and equipment; conduct of scientific and technical research and experiments in outer space. Further testing of station design, on-board systems and equipment; conduct of scientific and technical researc h and experiments in outer space.

• Burnup of the Salyut 4 Space Station (USSR) - . Nation: Russia. Spacecraft Bus: Almaz. Spacecraft: Salyut 4.