Abstract
This chapter deals with the equilibrium of the gravitational, aerodynamic and hydromechanic forces and moments acting on a sailing yacht and the implications thereof for the performance. An important aspect, the dependence of the minimum sustainable apparent wind angle on the aerodynamic efficiency of the sails and the hydrodynamic efficiency of the underwater-body is discussed in some detail. Other subjects covered are the dependence of the driving force, heeling force and efficiency of propulsion on the sheeting angle and the conditions of sailing.
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Notes
- 1.
Yachts with a moderate to high displacement/length ratio.
- 2.
- 3.
The result 4.3.12 is, of course, also obtained from Eq. 4.3.11 upon substitution of β = εA + εH.
- 4.
Reportedly (Marchai 2000), this expression was first published by H. Barkla (1965).
References
Barkla H (1965) The best course to windward, yachts and yachting, Feb 19
Gerritsma J, Keuning JA (1984) Experimental analysis of five keel-hull combinations, Delft University of Technology, Ship Hydromechanics Lab, Report no. 637
Marchai CA (2000a) Aero-hydrodynamics of sailing. Adlard Coles Nautical, London, p 48
Marchai CA (2000b) Aero-hydrodynamics of sailing. Adlard Coles Nautical, London, p 71
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Slooff, J. (2015). Sailing: Basic Mechanics. In: The Aero- and Hydromechanics of Keel Yachts. Springer, Cham. https://doi.org/10.1007/978-3-319-13275-4_4
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DOI: https://doi.org/10.1007/978-3-319-13275-4_4
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