File:Manned Maneuvering Unit at Smithsonian Air and Space - Udvar-Hazy Center.JPG
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DescriptionManned Maneuvering Unit at Smithsonian Air and Space - Udvar-Hazy Center.JPG |
English: The Manned Maneuvering Unit (MMU) is a backpack propulsion device that gave astronauts mobility for extravehicular activities outside the Space Shuttle. It enabled them to maneuver within the payload bay or fly some distance away without needing safety tethers anchored to the vehicle. The MMU had 24 small gaseous nitrogen thrusters and was operated with hand controllers on the arms of the unit.
On February 7, 1984, on Space Shuttle mission STS 41-B, astronaut Bruce McCandless tested this MMU, serial number 3. He made the first untethered spacewalk as he flew some 300 feet from the Shuttle. This MMU also flew on missions STS 41-C as the backup unit for the Solar Max satellite retrieval and STS 51-A as the prime unit for retrieving the Palapa communications satellite. Astronauts Bruce McCandless, Robert Stewart, James van Hoften, and Joseph Allen flew MMU #3 a total of 6 hours 29 minutes during these three 1984 missions. The MMUs were not used again. NASA transferred this one to the Museum in 2001. Transferred from NASA Johnson Space Center, Houston, TX |
Date | |
Source | Own work |
Author | Craigboy |
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
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current | 21:59, 18 March 2011 | 760 × 1,013 (141 KB) | Craigboy (talk | contribs) | {{Information |Description ={{en|1=The Manned Maneuvering Unit (MMU) is a backpack propulsion device that gave astronauts mobility for extravehicular activities outside the Space Shuttle. It enabled them to maneuver within the payload bay or fly some d |
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Camera manufacturer | NIKON |
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Camera model | COOLPIX L14 |
Exposure time | 5/49 sec (0.10204081632653) |
F-number | f/5.9 |
ISO speed rating | 400 |
Date and time of data generation | 16:35, 16 March 2011 |
Lens focal length | 18.9 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | GIMP 2.6.8 |
File change date and time | 16:55, 18 March 2011 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.2 |
Date and time of digitizing | 16:35, 16 March 2011 |
Image compression mode | 2 |
APEX exposure bias | 0 |
Maximum land aperture | 3.3 APEX (f/3.14) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
Color space | sRGB |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 0 |
Focal length in 35 mm film | 114 mm |
Scene capture type | Standard |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |