Yesterday, the crew of STS-123 mission executed the scheduled spacewalk to test the new heat-shield repair technique developed by NASA. The Tile Repair Ablator Dispenser, or T-RAD, was designed to be used in the repair of damaged heat tiles covering the underbelly of the space shuttle. The need for a repair technique for the heat shield became obvious with the disintegration of the space shuttle Columbia, during a re-entry maneuver in 2003.
While launching into space, the left wing of the sp...
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