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Spacewalkers attach Canadian robot's mechanical arms
Washington (AFP) March 16, 2008 Two US astronauts, working outside the International Space Station early Sunday, attached mechanical arms to a Canadian-made robot, enabling it to take over human tasks and reducing the need for future risky spacewalks. Mission Specialists Richard Linnehan and Mike Foreman finished their task at about 3:00 am (0700 GMT), stowing away instruments and making their way into the station's airlock. But their job got slightly complicated early in the seven-hour spacewalk when they encountered trouble unscrewing a couple of fasteners and removing one of the robot Dextre's arms from its storage container. The problem was eventually resolved with the help of a simple crowbar. But as a result, "the spacewalkers fell about 45 minutes behind their timeline," said a spokesman for the National Aeronautics and Space Administration (NASA). Linnehan and Foreman, who arrived last week aboard shuttle Endeavour, performed their task using socket wrenches and drills to bolt the Dextre robot's two 11-foot (3.3 meter) arms. Mission Specialist Robert Behnken coordinated the spacewalk activities from inside the orbital complex while Endeavour pilot Gregory Johnson and space station engineer Garrett Reisman operate Canadarm2. The hitch notwithstanding, astronaut Steve Robinson, monitoring the events from Mission Control in Houston, Texas, offered all involved hearty congratulations. "You sure did a great job," he radioed. "You guys ought to be proud of yourselves." The robot will be able to handle delicate tasks that have been performed by spacewalkers, allowing astronauts to focus on research inside the orbiting outpost that is key to international space exploration ambitions. Astronauts installed Europe's first space laboratory in a shuttle Atlantis mission last month and Endeavour's crew added the first of three parts of Japan's Kibo research facility this week. Astronauts continued to outfit the Japanese Logistics Module Saturday after it was inaugurated by ISS Commander Peggy Whitson and Japanese astronaut Takao Doi. "I am very proud of this occasion," Japanese program manager Tetsur Yokoama told reporters. Dextre, sent up on Endeavour which is docked with the space station, is the third and final component of the Canadarm Remote Manipulator System, the robotic arm that is Canada's vital contribution to the station. The 200-million-dollar robot encountered a technical glitch before its assembly, but the problem was resolved in time for Saturday's spacewalk. The 1.56-tonne robot will conduct operations such as replacing small components on the station's exterior -- tasks which until now required a human touch. Its presence will boost crew safety by reducing the number of hours that astronauts will have to be outside the station on spacewalks, and thus allowing them to focus on other tasks such as conducting scientific experiments in micro-gravity, according to the Canadian Space Agency. Dextre's two hands are each about the size of a small microwave oven. They are equipped with built-in socket wrenches, retractable claws used to grip objects, and remote-control high-resolution cameras. The robot's human-like upper torso swivels at the waist, and its arms were designed with seven joints to provide it with maximum versatility. Umbilical connectors provide power and data connectivity. With Dextre delivered to ISS in nine separate pieces, the astronauts will use three of the Endeavour mission's five spacewalks to get it up and running. Linnehan and fellow astronaut Garrett Reisman conducted the Endeavour mission's first spacewalk Friday to lay the groundwork for the robot's complicated assembly. Dextre's assembly will be complete with a third spacewalk set to start Monday. NASA plans to finish building the International Space Station by 2010, at which time it will retire its three-shuttle fleet. Community Email This Article Comment On This Article Related Links Station at NASA Station and More at Roscosmos S.P. Korolev RSC Energia Watch NASA TV via Space.TV Space Station News at Space-Travel.Com
Astronauts Enter Japanese Station Module; Power To Robot Restored
Washington (AFP) March 15, 2008US and Japanese astronauts have entered for the first time a newly-installed Japanese module as engineers restored power to a Canadian-made robot that is key to future work in building the International Space Station. |
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