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| Cosmos 1669 | July 19-August 30, 1985 | |
| Docked with Salyut 7 on July 21. At the time of its launch, some western analysts called Cosmos 1669 a free-flying platform resembling Progress.[1] However, it is now known the spacecraft tested improvements subsequently applied to increase the cargo load of Mir’s Progress spacecraft (Progress 25-42).[2] Delivered space suits to replace those damaged when Salyut 7 froze. | ||
1.10.4.4 Progress Missions to Mir
For information on Mir operations during these Progress missions, see section 2.9.3.
| Progress 25 | March 19-April 21, 1986 | |
| First Progress spacecraft to dock with Mir. It was launched soon after the Mir base block because the base block carried rations for only 20 days.[3] It marked an increase in Progress launch weight to 7240 kg. Maximum cargo load increased to about 2500 kg, with up to 1400 kg in the orbital module and 1200 kg in the tankage compartment. | ||
| Progress 26 | April 23-June 23, 1986 |
| Progress 27 | January 16-February 25, 1987 |
| Progress 28 | March 3-28, 1987 | |
| Delivered the usual supplies of food, water, fuel, and scientific equipment to Mir. After the space station crew filled it with refuse, it backed away and deployed a large (60 m) antenna for geophysical experiments. According to the Soviets, the assemblage was also a prototype of future space structures. A similar experiment was performed on Progress 40 (February 10-March 5, 1989). | ||
| Progress 29 | April 21-May 11, 1987 | |
| First Progress to dock with the Kvant rear port. | ||
| Progress 30 | May 19-July 19, 1987 |
| Progress 31 | August 3-September 23, 1987 |
| Progress 32 | September 23-November 19, 1987 | |
| Undocked on November 10 for maneuevering tests lasting 1.5 hr, then redocked. The tests were aimed at developing means of reducing propellant use during approach maneuvers. Undocked for final time November 17. | ||
| Progress 33 | November 20-December 19, 1987 |
