Performance prediction for sailing dinghies

This study describes the development of an approach for performance prediction for a sailing dinghy. Key modelling issues addressed include sail depowering for sailing dinghies which cannot reef; effect of crew physique on sailing performance, components of hydrodynamic and aerodynamic drag, decoupling of heel angle from heeling moment, and the importance of yaw moment equilibrium. In order to illustrate the approaches described, a customised velocity prediction program (VPP) is developed for a Laser dinghy. Results show excellent agreement with measured data for upwind sailing, and correctly predict some phenomena observed in practice. Some discrepancies are found in downwind conditions, but it is speculated that this may be related at least in part to the sailing conditions in which the measured data was gathered. The effect of crew weight is studied by comparing time deltas for crews of different physique relative to a baseline 80 kg sailor. Results show relatively high sensitivity of the performance around a race course to the weight of the crew, with a 10 kg change contributing to time deltas of more than 60 s relative to the baseline sailor over a race of one hour duration at the extremes of the wind speed range examined.

Language

  • English

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Filing Info

  • Accession Number: 01637683
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 2 2017 12:47PM