boatbuildlog

Design

Multichine 31

Designed by Roberto Barros

The Multichine 31 breaks with the usual beam to length proportions: at 9.45 m overall she is 3.54 m wide, and the designers reckon that gives her about the living space of a boat three or four feet longer. They also argue that the extra width costs little in build time or materials, the main penalties being a wider shed and harder road transport, and that marina fees based on length may even favour it.

She is built in plywood and glass and is said by her builders to be one of the most stable and seaworthy boats of her length. Published figures give 4,500 kg light displacement, 1,450 kg of ballast, a 1.63 m draft, 44 square metres of sail and a 21 hp auxiliary, with 360 litres of water and 1.84 m of headroom.

What building a Multichine 31 actually takes

Medians from the build logs kept on this site, not the designer’s estimate. Nobody has logged this boat here yet, so they are empty until the first builder does.

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Builds of this boat

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Boats like this one

Same type, closest in length.

Design Plans from LOA Logs
31 ft Auxiliary Ketch Benford Design Group 31′ 0″ (9.45 m) 0
Aurora Glen-L Marine 31′ 0″ (9.45 m) 0
Didi 950 Dudley Dix Yacht Design 31′ 2″ (9.5 m) 0
Cape Charles 32 Dudley Dix Yacht Design 31′ 5″ (9.57 m) 0
Cape Charles 32TC Dudley Dix Yacht Design 31′ 5″ (9.57 m) 0
Didi MG30 Dudley Dix Yacht Design 31′ 6″ (9.6 m) 0