RocketSTEM Issue #2 - April 2013 | Page 40

enviable task of keeping the spacecraft as close as just 60 cm from the station, whilst at the same time trying to prevent the unwanted oscillations from causing a collision. His task was compounded by the fact that a third of his field of view was blocked by the command module’s open hatch. “It made for some dicey times,” Weitz recalled. As the two vehicles entered orbital darkness, he paused in his work, then resumed as they flew within range of the tracking station. The shepherd’s crook was getting him nowhere and the torrent of fourletter words from all three members of the crew even prompted the capcom to advise them to modify their language; for they were on an ‘open mike’. The main problem, Conrad told the ground, was that a strip of metal had become wrapped across the solar array system during the separation of the micrometeoroid shield. Its metal bolts had tangled themselves in the array, thereby jamming it, and none of Weitz’ actions to cut the strap, even with the loppers, were having any effect. “Rather than cutting it across the short way, we were trying to cut along the long way,” Weitz explained, “and just didn’t have enough muscle with that thing, because it was six or eight feet out ahead of me and I was pulling on a line to try to do it.” The metal strap, ironically, was only a few centimetres wide, but it was riveted fast and Conrad knew they did not have a hope of breaking it using the tools in the command module. The attempt was called off and after 40 minutes or so the astronauts were instructed to close the hatch and re-dock with Skylab. On their first attempt to dock, the probe did not engage with the drogue and no fewer than three further attempts were also fruitless. “Pete gave Weitz the controls,” Nancy Conrad wrote, “depressurised the command module and opened the tunnel hatch. He and Joe dove head-first into the bank of circuits and gizmos, Pete cussing 38 38 A view of the repaired Skylab Space Station cluster in Earth orbit as photographed from the Skylab 4 Command and Service Modules (CSM) during the final fly-around by the CSM before returning home. The space station is contrasted against a cloud-covered Earth. Photo: NASA via Retro Space Images a blue streak as he sorted through wires, cutting and splicing like [an angry] Maytag repairman trying to get a dryer to work again.” After an hour or so of re-routing and connecting wires, bypassing electrical relays for the capture latches on the tip of the probe, skinning knuckles and a handful of undesirable vocabulary, Conrad used the service module’s thrusters to bring the two collars into direct contact, mechanically triggering the dozen capture latches. They were at Skylab to stay. Next morning, the crew op V