Keel arrangement for sailboat hull

AuthorSearch for:
TypeTechnical Report
Series titleUnited States Patent
AbstractThe invention provides an improvement in a keel arrangement for a sailboat hull, of the kind having an elongated ballast member spaced below the hull so as normally to extend horizontally and fore-and-aft under the hull, and a front foil and a rear foil depending respectively from a front and a rear portion of the hull, the lower ends of which between them support the ballast member, and in which the rear foil is pivotable about a vertical axis to allow it to act as a rudder. The improvement comprises a joint connecting a main, front portion of the ballast member to a minor, rear portion thereof, the joint allowing both longitudinal and rotational movement between the ballast member portions, whereby the foils can bend independently of each other, and the large majority of drag forces on the ballast member are resisted only by the front foil.
Publication date
AffiliationNRC Institute for Ocean Technology; National Research Council Canada
Peer reviewedNo
NRC number6247
NPARC number8895611
Export citationExport as RIS
Report a correctionReport a correction
Record identifier908d4b83-1745-462a-aca2-5d7f4b0d18ad
Record created2009-04-22
Record modified2016-10-03
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