R-Class icebreaker propeller open water experiments

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TypeTechnical Report
Series titleLaboratory Memorandum
SubjectR-Class; propeller open water experiments
AbstractIn 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.
Publication date
PublisherNational Research Council Canada. Institute for Marine Dynamics
PlaceSt. John's, NL
AffiliationNRC Institute for Ocean Technology; National Research Council Canada
Peer reviewedNo
NRC number5401
NPARC number8896097
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Record identifierce3bea9f-60a6-4bb3-a8ba-7ef57c52f640
Record created2009-04-22
Record modified2016-10-03
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