Safety

Stability is the Key

by Dave Gerr, Posted October 10, 2004

For multihulls, there are four important indicators of performance and stability: the Bruce Number; the Real Performance Index; the Stability Number; and the Stability Factor.

Bruce Number

Bruce Number is another form of the sail area-displacement ratio (a power-to-weight ratio). It shows how much sail area relative to displacement (weight) a boat has, but tells nothing about a


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Boat Reviews

Hanse 531

by Duncan Kent, Posted October 8, 2004
Hanse Yachts in Greifswald, in eastern Germany, was little heard of until the 1990s, when reunification allowed the yard to break into the worldwide production-boat market. Hanse has built fast cruising boats from 31 to 41 feet and recently launched its largest model, the 53-foot 531 that I tested off Cannes, France, this summer.

On Deck

The 531's deck layout is


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The Winged World of C Cats

by Sail Staff, Posted September 28, 2004
You would be forgiven for mistaking a room full of C Class catamaran sailors for aeronautical engineers. In some cases they are. The native C Cat speaker talks about Reynolds numbers, induced drag, camber, and angle of attack. They spew numbers and theories and formulas for speed.

The fraternity of international C Cat sailors spent much of September at Bristol Marine in Rhode Island. They


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Boat Reviews

West Wight Potter 15/19

by Sail Staff, Posted September 23, 2004

There is a reason why West Wight Potters have been in production for over 42 years. They may appear tiny compared to modern thin-water pocket cruisers, but their hard-chined hulls, simple sailplans, and economical accommodations are just as fun, safe, and effective as they were 40 years ago. Price: West Wight Potter 15, $7,395 (including sails, engine, and trailer, FOB Inglewood, CA);


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Boat Reviews

Shannon Shoalsailer 32

by Sail Staff, Posted September 23, 2004
All variable-draft boats depend on a fully deployed keel for windward performance. Walt Schulz of Shannon Yachts set himself the challenge of designing a 32-foot cruising boat that would sail to windward without drawing more than 30 inches. The result is the Shannon Shoalsailer, and Schulz's beamy design with dual shallow-draft bilge boards reportedly does just that. Schulz says the hull shape is
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Facnor's flat deck furler on a J/111

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