Soyuz 33

Soyuz 33

Infobox Space mission
mission_name = Soyuz 33
sign = Saturn
crew_members = 2
launch = April 10, 1979
17:34:34 UTC
Gagarin's Start
landing = April 12, 1979
16:35:40 UTC
320 km SE of Dzhezkazgan
duration = 1d/23:01:06
orbits = 31
next = Soyuz 34
previous = Soyuz 32 |

The Soyuz 33 mission was intended to dock with Salyut 6 but failed to do so due to an engine malfunction.

When approaching to within 4 km (2½ mi) of the station the engine was fired for a planned six second burn, but it shut down after three seconds and the Igla docking system also shut down. The Proton crew on the Salyut 6 reported flames shooting out of the main engine and towards the back-up engine at the time of the shutdown. The docking was called off and the craft began its return to earth.

During the descent to earth the back-up engine did not shut down at the end of the planned 188 second burn. Since it was not clear if the engine had operated at its correct thrust Rukavishnikov let it burn for a further 25 seconds before shutting it down manually. As a result of this Soyuz 33 made a steep ballistic reentry and experienced accelerations of up to 10"g" (100 m/s²). Examination of the engine was impossible as the service module was discarded after the mission.

Crew

Number in parentheses indicates number of spaceflights by each individual prior to and including this mission.

*Nikolai Rukavishnikov (3) - Commander
*Georgi Ivanov (Bulgaria) (1) - Research Cosmonaut

Backup crew

*Yuri Romanenko - Commander
*Aleksandar Aleksandrov (Bulgaria) - Research Cosmonaut

Mission parameters

*Mass: 6860 kg (15,120 lb)
*Perigee: 198.6 km (123.4 mi)
*Apogee: 279.2 km (173.5 mi)
*Inclination: 51.63°
*Period: 88.99 minutes

Mission highlights

*Intercosmos mission to Salyut 6 with Bulgarian cosmonaut.
*Failed to dock with Salyut 6 due to main engine fault.
*Retro burn with reserve engine.
*Reentry acceleration of 10 "g" (100 m/s²).

External links

* [http://www.videocosmos.com/soyuz33.shtm Soyuz 33 chronology at videocosmos.com]


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