Discovery 20

Discovery 20

Description

The Discovery 20 (also known as the C. White 20' TRI) is a lightweight, trailerable folding trimaran daysailer designed by Chris White of Chris White Designs (USA) in the early 1980s. It was offered as plans or kits for amateur home builders using wood/epoxy/glass composite construction (often 3 layers of western red cedar in constant camber panels for hulls, with plywood/epoxy accents), featuring vertical folding amas (outriggers) via deep webs that reduce beam from 16 ft rigged to 8.5 ft folded for trailering. No professional mass production occurred (regrettably, per designer notes), resulting in a very limited number built (dozens at most, primarily one-off or small-shop examples from the 1980s–2000s, e.g., by Multi Composite in Maine ~1994–1995); the design was updated/superseded by the Discovery 21 in ~2016 (lengthened to 21.25 ft, carbon wing mast option, kits/complete boats from Aquidneck Custom Composites). Key features include a spacious 7x7 ft cockpit with self-bailing footwell and wide seats (comfortable for 4 adults, even tested with a 75-year-old), daggerboard for upwind performance, rotating aluminum mast (25 lb, wood wing mast option), streamlined crossbeams, minimal heeling, and speeds of 12–16+ knots (bursts to 20 knots reported), making it a fast, safe, dry daysailer/camper-cruiser for bays/coastal use.

Construction Details

Designer Chris White
Builder Home Built
Length 20.000 ft
LOA 20.000 ft
Beam 16.000 ft
Displacement 527 lb
Max Draft 5.250 ft
Min Draft 1.330 ft
Year Built 1981
Request A Sail Quote

The standard boat dimensions

i 28 ft
j 7.83 ft
p 26.58 ft
e 8 ft
p2 -
e2 -
i2 -
j2 -

Sails

Discovery 20 - MAINSAIL

Luff * 25.75 ft - (7849 mm)
Foot * 12 ft - (3658 mm)
Leech * 27.78 ft - (8467 mm)
Tack Angle * 88 °
Diagonal * 28.03 ft - (8544 mm)
Head (inches) * 5.25 in - (133 mm)
Area * 159.42 ft²
Edit in Calculator

Disclaimer. Boats are not all the same -- even when produced in the same factory of the same model. Sailrite does its best to publish accurate dimensions, but we often find it worthwhile to have our customers measure their boats carefully before we produce kits for them. You should take the same precautions, especially when the data is not from Sailrite. The information on this site is not guaranteed to be accurate. Sailrite offers this content as a service to our community, but takes no responsibility for the reliability of the data provided.

Comments

© 2025 Good Old Boat, Inc. All rights reserved