Power Ratchet Tool Transfer Bag designed to carry the Hubble Space Telescope's ratchet tool on the Space Shuttle, measuring approximately 14″ x 23″ x 5″, annotated on the front, "Power Ratchet Tool Transfer Bag, Goddard Space Flight Center, Part No. PRT-TB02, Serial No. 01." The padded Beta cloth bag opens to a large compartment to hold the tool with attached torque limiter and one controller, with pouches on the flaps for two spare batteries. Velcro tabs below each pouch are marked "Charged" and "Discharged" to help track the battery's state of charge. In fine condition, with some stray drops of adhesive to seams. The Power Ratchet Tool (PRT) was a self-contained, power-driven drive ratchet tool with brushless DC motor for extravehicular use. The tool was flown on STS-31 as an alternative means to deploy the Hubble Space Telescope (HST) solar arrays after automatic mechanism failure, and it could be used as a general purpose power tool during HST maintenance missions.
Provenance: The Spaceflight America Museum and Science Center in Prince Frederick, MD.
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