MMU_v_bw_o_TPMBK (unnumbered, ca. 1979)
"The Manned Maneuvering Unit (MMU) is a one-man, self-contained, gas-propelled backpack, which snaps onto the spacesuit’s portable life-support system. Using rotational and translational hand controllers, the crewmember is able to fly with great precision in or around the Shuttle cargo bay or to nearby free-flying payloads or structures and to reach many otherwise inaccessible areas outside the Orbiter. In addition, it can be used to support payloads by enabling a crewmember to perform external inspections, deploy, service, repair, and retrieve satellites or possible repair of the Orbiter during early orbital flight tests. In the event of a disabled Orbiter, and MMU-fitted crewmember from a rescue Orbiter would assist in the pickup of crewmen trapped in the disabled Orbiter. The MMU is stowed for launch and landing in the forward portion of the Shuttle cargo bay at a flight support station. The MMU propellant is non-contaminating, gaseous nitrogen stored under high pressure and can be recharged from the Orbiter. The MMU system is designed to provide EVA support for up to six hours. The reliability of the MMU is guaranteed with a dual parallel system, rather than a backup, redundant system. In the event of a failure in one parallel system, it would be shut down and the remaining system would be used to the return the MMU to the Orbiter cargo bay. Either system provides complete control for a safe return, although with a reduced response. The MMU weighs 310 pounds and the flight support station weighs 175 pounds. The MMU is being developed by Martin Marietta Aerospace, Denver, Colorado under contract to the NASA Johnson Space Center, Houston, Texas.”
See also:
archive.org/details/NIX-S79-35607
MMU_v_bw_o_TPMBK (unnumbered, ca. 1979)
"The Manned Maneuvering Unit (MMU) is a one-man, self-contained, gas-propelled backpack, which snaps onto the spacesuit’s portable life-support system. Using rotational and translational hand controllers, the crewmember is able to fly with great precision in or around the Shuttle cargo bay or to nearby free-flying payloads or structures and to reach many otherwise inaccessible areas outside the Orbiter. In addition, it can be used to support payloads by enabling a crewmember to perform external inspections, deploy, service, repair, and retrieve satellites or possible repair of the Orbiter during early orbital flight tests. In the event of a disabled Orbiter, and MMU-fitted crewmember from a rescue Orbiter would assist in the pickup of crewmen trapped in the disabled Orbiter. The MMU is stowed for launch and landing in the forward portion of the Shuttle cargo bay at a flight support station. The MMU propellant is non-contaminating, gaseous nitrogen stored under high pressure and can be recharged from the Orbiter. The MMU system is designed to provide EVA support for up to six hours. The reliability of the MMU is guaranteed with a dual parallel system, rather than a backup, redundant system. In the event of a failure in one parallel system, it would be shut down and the remaining system would be used to the return the MMU to the Orbiter cargo bay. Either system provides complete control for a safe return, although with a reduced response. The MMU weighs 310 pounds and the flight support station weighs 175 pounds. The MMU is being developed by Martin Marietta Aerospace, Denver, Colorado under contract to the NASA Johnson Space Center, Houston, Texas.”
See also:
archive.org/details/NIX-S79-35607