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.”
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.