| Author | Search for: Hopkins, D. |
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| Format | Text, Memorandum |
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| Subject | R-Class; propeller open water experiments |
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| Abstract | In October 2002, propeller open water tests were performed using Memorial University's Opens Boat. The purpose of these experiments was to validate the creditability of the Opens Boat. The necessity of these experiments arose after several tests were performed using the MUN equipment that produced questionable results with regard to the torque values. The problems that were addressed during the testing procedure were: removal of an inner bearing in the Opens Boat to rectify the torque inconsistencies; a constant monitoring and recalibration of the shaft speed due to voltage variations during testing; and a temporary water seal on the Opens Boat to inhibit water ingress into the Open Boat during high carriage speed test runs. Once the problems with the Opens Boat were rectified, the results from the experiment were validated by comparison with tests performed earlier in Ottawa. Therefore, it is recommended that the Opens Boat should be utilized for future open water experiments. Other recommendations were also stated to ensure that the Opens Boat data would not be spoiled by other problems that may creep into the system. Some of these recommendations include: a replacement of the Data Acquisition System with a more reliable system that would include no exposed wires; a permanent sealant on all non-watertight joins; and a cover for the dynamometer. |
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| Publication date | 2002 |
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| Publisher | National Research Council Canada. Institute for Marine Dynamics |
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| Place | St. John's, Newfoundland, Canada |
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| Series | |
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| Language | English |
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| NRC number | NRC-IOT-5401 |
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| NPARC number | 8896097 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | ce3bea9f-60a6-4bb3-a8ba-7ef57c52f640 |
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| Record created | 2009-04-22 |
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| Record modified | 2025-12-04 |
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