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  First generation Soyuz to Salyut (1971)

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Author Topic:   First generation Soyuz to Salyut (1971)

Posts: 117
Registered: Jul 2016

posted 11-09-2017 01:20 AM     Click Here to See the Profile for Jim_Voce   Click Here to Email Jim_Voce     Edit/Delete Message   Reply w/Quote
The first Soyuz spacecraft (Soyuz 1 through Soyuz 8) had solar panels and could stay in space for over a week. But the first Soyuz spacecraft designed for use with the Salyut space station (Soyuz 12 through 40) did not have solar panels and used chemical batteries instead. And they could only stay in space for two days before oxygen would be depleted in the spacecraft.

I assume this was done to save weight in the spacecraft so that supplies could be carried to the space station or so that more fuel could be carried aboard the spacecraft for maneuvering purposes. Does anyone know if the weight savings were for supplies or for fuel?

Secondly, the very first spacecraft to visit a Salyut were Soyuz 10 and 11 and these craft also could only stay in space for two days. But did these spacecrafts have solar panels or chemical batteries?


Posts: 635
From: Salzburg, Austria
Registered: Jun 2003

posted 11-09-2017 06:39 AM     Click Here to See the Profile for cosmos-walter   Click Here to Email cosmos-walter     Edit/Delete Message   Reply w/Quote
Soyuz was scheduled to reach to moon, rather than to supply a space station. Therefore solar panels and two compartments for cosmonauts were provided.

Jim Behling

Posts: 1169
From: Cape Canaveral, FL
Registered: Mar 2010

posted 11-10-2017 10:23 PM     Click Here to See the Profile for Jim Behling   Click Here to Email Jim Behling     Edit/Delete Message   Reply w/Quote
Soyuz 10 and 11 had solar arrays and were the same as 1 through 9. They did not have the two day flight time limit.

The two day limit was due to battery power.

The removal of crew member and solar arrays were to accommodate ECS mods for space suits.

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