GordonD Posted November 1, 2020 Share Posted November 1, 2020 1 NOVEMBER 1983 Vladimir Lyakhov & Aleksandr Alexandrov (Salyut 7 Expedition 2) Duration 2 hr 50 min During the long lifetime of the Salyut 6 station, the efficiency of its solar arrays had degraded noticeably, reducing the level of electrical power they produced, so the arrays on Salyut 7 had been designed so that they could be augmented as time went on. During preparations for the EVA, Aleksandrov discovered a tear in his suit's primary pressure bladder, so this had to be repaired first: this was clearly effective as no problems were experienced during the spacewalk. Aleksandrov set up a TV camera so that Mission Control could monitor their activities; then the cosmonauts removed the add-on array section from its delivery container. Forty minutes into the EVA, Salyut passed out of range of ground stations and tracking ships and then into orbital night, so the cosmonauts rested until sunrise. They then used a special winch to unfurl the new array alongside the existing panel. The add-on was 5m long and 1.5m wide and would augment Salyut's electrical power by 25%. During the EVA Lyakhov was reprimanded for releasing small pieces of junk so he could watch them glittering in the sunlight as they floated away, as this could have interfered with Salyut's star sensors. Second EVA for Lyakhov (the first Soviet cosmonaut to achieve this); first for Aleksandrov. 2012 Sunita Williams & Akihiko Hoshide (ISS Expedition 33) Duration 6 hr 38 min The astronauts dealt with a leak in the station's cooling system, rerouting the ammonia flow to the P6 Truss radiator through a secondary loop, thus bypassing the location of the leak but allowing the radiator to continue operation while Mission Control monitored the situation. Seventh and last EVA for Williams (the first woman to carry out so many); her career total amounts to 50 hr 40 min. Third and last for Hoshide: his total is 21 hr 23 min. 1 Link to comment Share on other sites More sharing options...
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