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STS-41-B was NASA's tenth Space Shuttle mission and the fourth flight of the Space Shuttle Challenger. It launched on February 3, 1984 and landed on February 11, 1984, after deploying two communications satellites. It was also notable for including the first untethered spacewalk.
This mission marked the first checkout of the MMU and Manipulator Foot Restraint (MFR). McCandless made the first untethered free flight on each of the two MMUs carried on board, thereby becoming the first person to make an untethered spacewalk. [3] He described the experience: [11] I was grossly over-trained. I was just anxious to get out ...
Scott and Doi captured the Spartan satellite by hand and secured it in the payload bay. Then the spacewalking team set up and tested a crane that would be used to construct the International Space Station. Doi was the first Japanese astronaut to perform an EVA, and the first EVA performed from Space Shuttle Columbia. [130] 162. STS-87 – EVA 2
Photo: Reuters. McCandless was the first person to spacewalk untethered on February 7, 1984 wearing only a jetpack — or Manned Maneuvering Unit — later used to retrieve faulty communication ...
U.S. astronaut Bruce McCandless uses a Manned Maneuvering Unit during the 1984 STS-41-B mission. The Manned Maneuvering Unit (MMU) is an astronaut propulsion unit that was used by NASA on three Space Shuttle missions in 1984. The MMU allowed the astronauts to perform untethered extravehicular spacewalks at a distance
The first untethered spacewalk was made by American Bruce McCandless II on February 7, 1984, during the Space Shuttle Challenger mission STS-41-B, using the Manned Maneuvering Unit. He was subsequently joined by Robert L. Stewart during the 5-hour, 55-minute spacewalk.
February 7 – Astronauts Bruce McCandless II and Robert L. Stewart make the first untethered space walk. The National Radio Astronomy Observatory in the United States converts the 36-foot radio telescope on Kitt Peak (originally built in 1967) to the ARO 12m Radio Telescope.
McCandless and Stewart rode on the Crewed Maneuvering Unit (MMUs) during the first untethered EVAs in history. Both astronauts practiced using tools and procedures for the planned capture and repair of the Solar Maximum Mission (SMM) satellite to be performed in a subsequent flight.