A solution to the inherent list on Nimitz class aircraft carriers
Thesis (Nav. E.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2004.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2006
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| Online Access: | http://hdl.handle.net/1721.1/33439 |
| _version_ | 1811095801097617408 |
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| author | Wolfson, Dianna |
| author2 | David R. Burke. |
| author_facet | David R. Burke. Wolfson, Dianna |
| author_sort | Wolfson, Dianna |
| collection | MIT |
| description | Thesis (Nav. E.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2004. |
| first_indexed | 2024-09-23T16:28:30Z |
| format | Thesis |
| id | mit-1721.1/33439 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T16:28:30Z |
| publishDate | 2006 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/334392019-04-11T14:06:04Z A solution to the inherent list on Nimitz class aircraft carriers Wolfson, Dianna David R. Burke. Massachusetts Institute of Technology. Dept. of Civil and Environmental Engineering. Massachusetts Institute of Technology. Dept. of Ocean Engineering. Massachusetts Institute of Technology. Dept. of Civil and Environmental Engineering. Ocean Engineering. Civil and Environmental Engineering. Ballast (Ships) Ballast water Aircraft carriers Thesis (Nav. E.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2004. Includes bibliographical references (p. 53). Nimitz class aircraft carriers possess an inherent list to starboard that their list control systems (LCS) are typically unable to correct while under Combat Load Conditions. As a result, it has become necessary to use fresh water ballast in a number of inner bottom voids and damage control voids to augment the LCS. Maintaining liquid ballast in damage control voids is unacceptable, as it reduces the design counter flooding capability of the ship, and thus reduces ship survivability. In order to restore the ships operational flexibility and achieve the necessary/desired list correction, this study determines the effect of adding solid ballast to a series of voids/tanks identified on the 2nd, 4th, and 8th decks. Based on ballast density, tank location and capacity, ease of ballast installation, minor tank structural modifications, and a decision making cost analysis, solid ballast was determined to be the most advantageous for use in correcting the inherent list on the Nimitz class aircraft carriers. Fresh water ballast was also examined as a possible alternative, but not as extensively due to the large quantity of water required and its limited ability to achieve a list correction. Nimitz class aircraft carriers currently have an average list of 1.5 degrees and a KG of 47 feet. (cont.) Since their allowable KG cannot exceed 48.5 feet, the average service life allowance (SLA) for KG is approximately 1.5 feet. This study shows that by adding approximately 400 Iton of solid ballast, list can be corrected by 1.5 degrees with only a 0.1 percent increase in KG. Thus, to permanently fix the average Nimitz class aircraft carrier starboard list, there would be a 0.05 foot increase in KG, which in all cases is within the SLA. Additionally, this study shows that this 1.5 degree list correction can be accomplished at a low cost of approximately $1,200 per Iton. Considering the reduction in operational constraints and the benefits to ship survivability, this is truly an inexpensive proposition. by Dianna Wolfson. S.M. Nav.E. 2006-07-13T15:24:28Z 2006-07-13T15:24:28Z 2004 2004 Thesis http://hdl.handle.net/1721.1/33439 62869277 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 159 p. 6886968 bytes 6893639 bytes application/pdf application/pdf application/pdf Massachusetts Institute of Technology |
| spellingShingle | Ocean Engineering. Civil and Environmental Engineering. Ballast (Ships) Ballast water Aircraft carriers Wolfson, Dianna A solution to the inherent list on Nimitz class aircraft carriers |
| title | A solution to the inherent list on Nimitz class aircraft carriers |
| title_full | A solution to the inherent list on Nimitz class aircraft carriers |
| title_fullStr | A solution to the inherent list on Nimitz class aircraft carriers |
| title_full_unstemmed | A solution to the inherent list on Nimitz class aircraft carriers |
| title_short | A solution to the inherent list on Nimitz class aircraft carriers |
| title_sort | solution to the inherent list on nimitz class aircraft carriers |
| topic | Ocean Engineering. Civil and Environmental Engineering. Ballast (Ships) Ballast water Aircraft carriers |
| url | http://hdl.handle.net/1721.1/33439 |
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