GordonD Posted September 1, 2020 Share Posted September 1, 2020 1 SEPTEMBER 1985 James van Hoften & William Fisher (STS-51I) Duration 4 hr 26 min The previous day, the astronauts had repaired the Syncom IV-3 satellite; now it was time to send it on its way. They installed an instrumented cover over the nozzle of its apogee kick motor, then armed it. After Syncom was released by the manipulator, they found it difficult to handle, largely because they were on opposite sides of the 4.3m drum and could not see each other, and sometimes tried to move it with opposing motions. Van Hoften warned that "if something happens and I’m about to lose it, I’m going to give it a heck of a push and bail out!" They managed to get it under control, however, and van Hoften--whose nickname in the astronaut corps was 'Ox'--manually spun it up to 3rpm and released it. The boost to geostationary orbit would not take place for some time, allowing the satellite to warm up first, but eventually it reached its operational position and went to work. In their post-flight debrief, the astronauts recommended against carrying out EVAs on consecutive days. Fourth and last EVA for van Hoften, bringing his career total to 21 hr 13 min. Second and last for Fisher: his total amounts to 11 hr 51 min. 2009 Daniel Olivas & Nicole Stott (STS-128/ISS) Duration 6 hr 35 min Stott had arrived at the ISS aboard Discovery, but after docking she replaced Tim Kopra as part of the Expedition 20 team. The astronauts performed various maintenance tasks on the ISS, starting with the removal of a depleted ammonia tank from the P1 Truss. This involved disconnecting two ammonia, two nitrogen and two electrical lines. The station's manipulator arm was used to transport the empty tank to a temporary stowage area. They then retrieved space exposure experiments from the Columbus laboratory and brought them inside. Third EVA for Olivas; the only one for Stott. 2016 Jeff Williams & Kate Rubins (ISS Expedition 48) Duration 6 hr 48 min The main objective of this EVA was to retract a thermal radiator on the P6 Truss. This was used during the early years of the station's construction, when its main cooling system was not yet operational. Though no longer in use, it had been deployed during an EVA in 2012 in an attempt to isolate a coolant leak. With it still in an extended position, it was at risk of damage from micro-meteoroid strikes, so it had been decided to retract it during an EVA the previous November, but time constraints meant this was not achieved. This time, however, the retraction went smoothly, the radiator folding in like an accordion when a single bolt was turned with a pistol-grip tool. Once closed, the radiator was secured in place and a thermal cover fitted on top. The astronauts also installed two enhanced high-definition cameras on the truss, tightened bolts on one of the solar array rotary joints, photographed the joint's interior and tied back a thermal blanket. Fifth and last EVA for Williams: his career total is 31 hr 55 min. Second and last for Rubins: her total is 12 hr 46 min. 1 Link to comment Share on other sites More sharing options...
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