BoatsGloucester 20

Gloucester 20

Fractional Sloop · Swing Keel · First built 1981

A fractional sloop with a swing keel designed by Stuart Windley and Harry Sindle for versatile, shoal-water sailing

Designed by Stuart Windley & Harry R. Sindle.

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Swing Keel

Is it for you?

Character

Where this design lands on the numbers a shopper trusts — read straight from her own ratios.

TrailerableBeam 2.29 m — inside the 2.55 m no-permit tow width across most of Europe, and the 2.59 m US and Canadian limit. About 748 kg of hull, so roughly 1,350 kg on a trailer: check that against your own towing rating.Ramp-launchableAbout 748 kg of hull, with a keel that raises or a draught shallow enough to float off a trailer — she can go back on the trailer at the ramp, not only into the water.Shoal draughtDraws 0.30 m, board up where she has one — creeks, sandbars and thin anchorages most keels have to stay out of.
LivelySea-kindly

Her light displacement on a beamy beam gives 10 — a quick, lively motion that feels every wave.

Comfort ratio 10
CoastalBluewater

At 2.54 she sits above the 2.0 line — beamy for her weight, and happiest coastal.

Capsize screening 2.54
LightHeavy

164 — light for her waterline, so she is easily driven and quick to accelerate.

Displacement / length 164
EasygoingPowered-up

20.0 — plenty of sail for her weight; lively and quick to respond.

Sail area / displacement 20.0
TenderStiff

33% of her weight is ballast — on the tender side; she'll heel readily and want a reef sooner.

Ballast 33%

Light and lively — happiest day-sailing and coastal-hopping in settled weather.

The record

Full specifications

The complete reference set — tap any figure to switch between metric and imperial.

Dimensions
Weights
Ballast / displacement
33.3%
Rig & sail area
Rig
Fractional Sloop
Ratios
SA / displacement
20.0
Displacement / length
164.0
Comfort ratio
10.0
Capsize screening
2.54
Hull speed
5.4 kn
Pounds / inch immersion
442
Hull
Hull type
Swing Keel
Construction
Fiberglass
Production
Years built
First built 1981
Units built
165
Designer
Stuart Windley, Harry R. Sindle
Builder
Gloucester Yachts Inc, Lockley Newport Boats

Boats like this, on the water

Nobody has filmed this one — but these are close.

Comparable boats the fleet has on camera: same type, within a quarter of her length. Open the boat, or watch the video — a timestamp means she only appears in passing.

Dufour Yachts T66.15 mSame hull family0.2 m longerA lightweight 800kg fractional sloop with a high sail-area-to-displacement ratio for spirited performance in light air
Marshall Marine Corporation Sanderling5.54 mSame hull family0.4 m shorterA gaff-rigged catboat based on a 1941 design, featuring a shallow-draft keel-centerboard hull for versatile day sailing
Catalina Yachts 227.26 mSame hull family1.3 m longerA prolific masthead sloop with 15,000 built, offering a versatile swing-keel design for trailerable coastal cruising
Microtonner 195.50 mSame hull family0.4 m shorterA high-performance fractional sloop designed by Nestor Volker to the International Micro Class rule for competitive racing
Melges 247.32 mSame hull family1.4 m longerA 7.32-metre sportboat with a lifting keel and a 32.09 sail-area-to-displacement ratio built for rapid planing

The family

Boats like this

Nearby designs by size, type, and era — worth a look alongside her.

Keep looking

Nothing filmed of this one yet

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