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How key dimensions and performance ratios for sailboats are, or should be, calculated. A famous designer walks you through 20 of them, including his own widely-used invention, the Comfort Ratio.
[Ted Brewer Yacht Design, Gabriola Island, BC, Canada]
One of the best discussions of the measurements and ratios that a builder or designer should furnish for you to evaluate a boats, and what they tell you about its performance and seaworthiness.
[Kasten Marine Design, Inc., Port Townsend, WA, USA]
A noted designer′s lucid explanations of 33 yacht measurements, calculated numbers, and performance ratios. Illustrated.
[Good Old Boat, July/August 1999]
On-line database of boat dimensions and calculator of performance ratios such as Max Hull Speed, SA/D, D/L, Motion Comfort and others. You can type in the dimension of the boat you want to analyze, or use Carl′s numbers for over 600 boats. You can print the results or e-mail them to yourself. You can also type in your desired dimensions, and Carl will list boats meeting your request.
[Carl Adler, USA]
Range of positive stability, capsize screening formula, displacement-length ratio, sail area/displacement ratio, and hull speed explained, as well as why you should know these numbers for any boat you are looking at.
[SailNet, 2 June 2003]
A layman′s explanation of sailboat stability, followed by a complex formula you can use to estimate a boat′s stability and compare it to a safe standard.
[John Holtrop, Ridgecrest, CA, USA]
151 boats are selected out of 700 suitable for offshore use based on the author′s evaluation factors. The factors are derived from analysis of nine top cruising sailboat designers.
[John Holtrop, Ridgecrest, CA, USA]
One liveaboard′s opinions on what separates a well-founded ocean-going sailboat from a coastal-cruising weekend boat, in design and particularly in equipment.
[Robert Doty, Jacksonville, FL, USA]
Some rules of thumb for seaworthiness.
[SailNet, 8 April 2001]
Clear explanation of these performance ratios. If you′re not sure you understand them after looking at on-line resources, by all means read this page.
[Practical Sailor, 1 December 2002]
Sailing yachts are like stereo gear. You can study all the ratings, but you have to listen to the components in your own environment to truly evaluate the performance.
Bob Perry, yacht designer
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