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NASA-LLIS-4059
Lessons Learned - Flexhose Quick Disconnect (QD) Design Improvement for Easier Use
Year: 2011
Abstract: Abstract:
Large quick disconnects (QDs) in ground support equipment (GSE) can be very difficult to successfully mate to air half couplings (AHCs) because they have bulky, heavy hoses that must be rotated along with the ground half couplings (GHCs) in order to be attached to the AHCs. It frequently takes several attempts to successfully mate the QDs. Often it appears that the GHC is successfully mated to the AHC, only to find out later that the mate was not successful. The weight, orientation, and degree of twist of the hose relative to the QD make it difficult to lock the connection in place, even by pulling on the hose. It would be easier to mate the GSE to the vehicle if the design of the flexhose interposed a swivel mechanism between the hose and QD. The GHC could then be moved and rotated much more easily, thereby reducing the risk of having a failed mate.
Large quick disconnects (QDs) in ground support equipment (GSE) can be very difficult to successfully mate to air half couplings (AHCs) because they have bulky, heavy hoses that must be rotated along with the ground half couplings (GHCs) in order to be attached to the AHCs. It frequently takes several attempts to successfully mate the QDs. Often it appears that the GHC is successfully mated to the AHC, only to find out later that the mate was not successful. The weight, orientation, and degree of twist of the hose relative to the QD make it difficult to lock the connection in place, even by pulling on the hose. It would be easier to mate the GSE to the vehicle if the design of the flexhose interposed a swivel mechanism between the hose and QD. The GHC could then be moved and rotated much more easily, thereby reducing the risk of having a failed mate.
Subject: Advanced planning of safety systems
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T18:32:09Z | |
| date available | 2017-09-04T18:32:09Z | |
| date copyright | 06/28/2011 | |
| date issued | 2011 | |
| identifier other | JAQDNEAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std;query=author:%22NAVY%20-%206159DD6E273C9FCD0Facil/handle/yse/214366 | |
| description abstract | Abstract: Large quick disconnects (QDs) in ground support equipment (GSE) can be very difficult to successfully mate to air half couplings (AHCs) because they have bulky, heavy hoses that must be rotated along with the ground half couplings (GHCs) in order to be attached to the AHCs. It frequently takes several attempts to successfully mate the QDs. Often it appears that the GHC is successfully mated to the AHC, only to find out later that the mate was not successful. The weight, orientation, and degree of twist of the hose relative to the QD make it difficult to lock the connection in place, even by pulling on the hose. It would be easier to mate the GSE to the vehicle if the design of the flexhose interposed a swivel mechanism between the hose and QD. The GHC could then be moved and rotated much more easily, thereby reducing the risk of having a failed mate. | |
| language | English | |
| title | NASA-LLIS-4059 | num |
| title | Lessons Learned - Flexhose Quick Disconnect (QD) Design Improvement for Easier Use | en |
| type | standard | |
| page | 3 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;2011 | |
| contenttype | fulltext | |
| subject keywords | Advanced planning of safety systems | |
| subject keywords | Configuration Change Control | |
| subject keywords | Engineering design and project processes and standards | |
| subject keywords | Ground processing and manifesting | |
| subject keywords | Ground support systems | |
| subject keywords | Human Factors | |
| subject keywords | Human factors planning | |
| subject keywords | Lander Systems | |
| subject keywords | Launch support systems | |
| subject keywords | Launch Systems | |
| subject keywords | Orbiting Vehicles | |
| subject keywords | Quality |