boatbuildlog

Design

Acorn 21

Designed by Richard Woods

A 21 ft trailable sailing catamaran by British multihull designer Richard Woods, sold through Bateau and Boat Builder Central. It is a lightweight, minimalist fast cruiser with a single berth in each hull and a boom tent, 12 ft 5 in wide and about 880 lb. Boards, rudders and spars can come from a large beach cat such as a Hobie 18, and the optional racing rig is meant for experienced sailors.

Hard-chine plywood hulls with epoxy taped seams and glass sheathing outside, with a chine log as an option. Plans are metric. The designer's figure is about 300 hours to bring the hulls to the sanding and paint stage, so budget 500 to 800 hours for the whole boat. Measured medians from build logs appear below.

What building a Acorn 21 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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Build logs
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Launched
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Median hours
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Median months

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Boats like this one

Same type, closest in length.

Design Plans from LOA Logs
Acorn Woods Designs 6.4 m (21′ 0″) 0
Cat 22 Bateau 21′ 6″ (6.55 m) 0
Janus Woods Designs 6.65 m (21′ 10″) 0
Janus 22' Full Bateau 21′ 10″ (6.65 m) 0
Saylon 20 Bateau 20′ 0″ (6.1 m) 0
Saylon 20 Woods Designs 6.1 m (20′ 0″) 0