Some exploratory tests on circular and sidewall air cushion icebreaker bows

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ConferenceIcebreaking, Cold Weather Operations, Vehicles : Papers on Air Cushion Technology
SubjectACIB; icebreaking; ice breaker; bow; model testing
AbstractThis report describes an ice tank experiment that investigated the ice breaking performance of circular and sidewall Air Cushion Icebreaker Bows (AICBs) proposed in 1984 by German and Milne Incorporated. The model tests were conducted in the ice tank at the Institute for Marine Dynamics of the National Research Council Canada. The objective was to examine the ice breaking capability of the two designs so as to better understand the ice break mechanisms. Data available from field and other model tests were also compared against the present data. In reviewing the data, it was found that for the circular craft the towing resistance for an intact wheet closely matches that of a presawn sheet with the same thickness. This suggests that the breaking component of resistance is insignificant and that ice strength properties scaling laws were developed and used for data presentation. For the sidewall craft, strength properties cannot be ignored because the resistance due to the shearing action of its sidewalls is significant.
Publication date
PublisherTransport Canada, Transportation Development Centre
AffiliationNRC Institute for Ocean Technology; National Research Council Canada
Peer reviewedNo
NRC number5653
NPARC number8895820
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Record identifier2301f098-d11c-4c4a-948f-f2782d83aed7
Record created2009-04-22
Record modified2016-05-09
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