Just before the start of another communication session, Volkov noticed a smell of smoke from somewhere at the rear of the station. As soon as communication with the ground was established, he reported: “Aboard the station is ‘the curtain’!”
Dobrovolsky wrote in his diary, “Some days were a nightmare. There was a general absence of everything: no interesting things, no happiness, the monotonous sound of the ventilators, strong smells, numerous experiments. It seemed to me that Flight Control simply wished to test our endurance.”
Volkov radioed “Zarya, wait! Yantar 3 is in Soyuz. Don’t start until Yantar 3 has returned to the Salyut! There is a strong smell in Salyut! He will put on a mask and go in again!”
“I am proud to have been involved in the Vostok spacecraft which carried Gagarin on the first manned space flight and in its modification for Voskhod.” Volkov
The Vulcan device consisted of two major units. The first unit included various welding devices and a turn-table with samples of metals to be welded. The second unit consisted of an electric power pack, a protective shield which covered the welding unit, and a remote control console.
Finally, on April 25, 1969 during a meeting of the Soyuz State Commission, it was decided that the solo and docking flights outlined for 1969 by design bureau OKB-1 would be combined into a joint flight of three spacecraft. The plan was to fly Soyuz 6, 7, and 8 together in August of 1969; Soyuz 7 and 8 would dock and 6 would rendezvous with the docked pair and take pictures of it as well as perform a welding experiment.