1980-027A
After the aborted EO-1 flight and the lonely EO-3 flight, Valeriy Ryumin tried again with EO-4. His commander this time was Leonid Popov. They took off aboard 7K-T 11F615A8 No. 51, which was named Soyuz-35 on reaching orbit on 1980 Apr 9. The Soviet-Hungarian crew of Valeriy Kubasov and Bertalan Farkas took over the ship in June 1980 and landed it 140 km SE of Dzezkazgan on Jun 3. The landing was the roughest ever, at 30gs, because an altimeter failure resulted in the soft-landing rockets not firing.
| Soyuz-35 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1980 Apr 9 | 1338:22 | Launch by Soyuz-U | KB |
| 1340 | Blok BVGD sep | ||
| 1343 | Blok A sep | ||
| 1347 | Blok I MECO | ||
| 1347 | Blok-I sep | 88.9 197 x 247 x 51.6 | |
| 1980 Apr 10 | 1516 | Docked with Salyut-6 -X | |
| 1635 | EO-4 crew to Salyut | ||
| 1980 Jun 3 | 0920 | EP crew (Kubasov, Farkas) to Soyuz | |
| 1147 | Undocked -X | ||
| 1416 | Deorbit | ||
| 1420? | DO CO | ||
| 1437 | BO and PAO sep from SA | ||
| 1442? | Entry | ||
| 1506:23 | SA landed 140 km SE of Dzezkazgan | ||
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