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Trim effect on the resistance of sailing planing hulls

Lookup NU author(s): Dr Ignazio Maria Viola, Josh Enlander

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Abstract

Sailing skiffs are light-weight high-performance small boats of growing interest in competitive sailing. The present paper presents towing tank tests performed on the Aura skiff, which was a candidate for the 2016 Olympic games. Resistance, sink and trim were measured for different longitudinal positions of the crew weight and for Froude numbers (based on the boat's length over all) ranging from 0.30 to 1.03. For each test, detailed analysis of the measurement uncertainty was performed. The measured resistance was found in good agreement with the resistance computed with established empirical formulations developed for planing hulls. It was found that the optimum crew position moves from forward to aft when the Froude number increases. An incorrect longitudinal centre of gravity led to a maximum resistance penalty at Froude number around 0.4. These trends are in agreement with the sailor's experience and with measurements performed by other authors on large vessels. (C) 2014 Elsevier Ltd. All rights reserved.

Publication metadata

Author(s): Viola IM, Enlander J, Adamson H

Publication type: Article

Publication status: Published

Journal: Ocean Engineering

Year: 2014

Volume: 88

Pages: 187-193

Print publication date: 15/09/2014

Online publication date: 11/07/2014

Acceptance date: 22/06/2014

ISSN (print): 0029-8018

ISSN (electronic): 1873-5258

Publisher: Pergamon Press

URL: http://dx.doi.org/10.1016/j.oceaneng.2014.06.025

DOI: 10.1016/j.oceaneng.2014.06.025

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