Soyuz 15

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Mission dates
Mission: Soyuz 15
COSPAR-ID : 1974-067A
Spacecraft: Soyuz 7K-T ( GRAY index  11F615A9)
serial number 63
Dimensions: 6760 kg
Launcher: Soyuz (GRAY index 11A511)
Call sign: Дунай (Duna - " Danube ")
Crew: 2
Begin: August 26, 1974, 19:58:05  UTC
Starting place: Baikonur 1/5
Space station: Salyut 3
Landing: August 28, 1974, 20:10:16 UTC
Landing place: 48 km southwest of Zelinograd
Flight duration: 2d 0h 12min 11s
Earth orbits: 32
Rotation time : 88.5 min
Apogee : 236 km
Perigee : 173 km
◄ Before / After ►
Kosmos 672
(unmanned) 		Soyuz 16
(manned)
Previous manned mission:
Soyuz 14
Gennady Vasilyevich Sarafanov (left) and Lev Stepanovich Djomin (Soviet postage stamp, 1974)

Soyuz 15 is the mission designation for the flight of a Soviet Soyuz spacecraft to the Soviet space station Salyut 3 (ALMAZ 2), which started on August 28, 1974 . It was the second visit by a Soyuz spacecraft to this space station and the 30th flight in the Soviet Soyuz program. After Soyuz 14 , two modifications of the Soyuz spaceship, Kosmos 670 and Kosmos 672, were tested on unmanned trials.

crew

Main crew

Djomin and Sarafanow were previously substitutes for Soyuz 14.

Substitute team

The support team consisted of Vyacheslav Sudov and Valery Roshdestvensky .

Mission overview

The plan was to continue work with the Salyut 3 / Almaz 2 station. The spaceship initially approached the station as planned, using the Igla automatic docking system, up to around 300 m. Then the system did not switch to the final approach sequence, but switched to a mode that normally controls the approach from a distance of around three kilometers. It accelerated the spaceship to a speed relative to Salyut 3 of up to 72 km / h. At this relative speed, Soyuz 15 flew past the station just 40 m away. A total of three automatic approaches took place. After that, there was only enough fuel left to ensure the return to Earth. The flight had to be terminated after two days.

Effects

Since the coupling system of the Soyuz spaceship had to be revised, Salyut 3 could no longer be manned. The next planned space flight, Soyuz 16 with Volynov and Sholobov, was canceled. Instead, the next spaceship to fly in December 1974 was a version equipped with a coupling mechanism for the Apollo-Soyuz project . In January 1975 the space station operation could be continued with Salyut 4 . Since, in contrast to Salyut 3, it was a civilian station, Volynov and Sholobow had to wait two years before the next military station ( Salyut 5 ) before they could be deployed .

See also

Web links

Individual evidence

  1. ↑ russianspaceweb.com: OPS-2 (Salyut-3). February 16, 2009, accessed April 28, 2009 .