Credit: © Mark Wade. 2,961 bytes. 306 x 329 pixels.
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| Salyut 4 - Credit: © Mark Wade. 2,961 bytes. 306 x 329 pixels. |
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
Total Length: 13.1 m. Maximum Diameter: 4.2 m. Total Mass: 18,210 kg. Total Propellants: 2,000 kg. Primary Engine Thrust: 417 kgf. Main Engine Propellants: Nitric Acid/Hydrazine. Main Engine Isp: 282 sec. Total spacecraft delta v: 320 m/s. Electric system: 2.00 total average kW. Electrical System: Solar Panel Span: 17.0 m, area: 60 sq. m.
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 - Salyut 4 - Soyuz 17 20,127 bytes. 499 x 318 pixels. |
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.