Analysis of rudder span effects on IMS hydrodynamic induced drag

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TypeArticle
Journal titleJournal of Ocean Technology
Volume2
Issue3
Pages3346; # of pages: 14
AbstractThe physical draft of keels has long been known to be critical for the upwind performance of sailboats and has long been an element of handicap rules. The IMS rule uses a relatively sophisticated algorithm for assessing keel draft yet, as is the case with other rules, has never included any influence of rudder span. However, there is considerable empirical evidence that rudders can make a significant contribution to performance by increasing the total effective draft. Tank test research was conducted to explore rudder span and quantify performance differences. The results have been incorporated into the IMS 2002 rule in a way that is intended to give some rating relief to boats with shallow rudders yet to not drive optimised design in that direction.
Publication date
PublisherFisheries and Marine Institute of Memorial University
AffiliationNRC Institute for Ocean Technology; National Research Council Canada
Peer reviewedYes
IdentifierIR-2007-57
NRC numberNRC-IOT-6559
NPARC number8896192
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Record identifierd7c3a67c-6b3b-4f94-9f85-110fe7e8b367
Record created2009-04-22
Record modified2017-04-28
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