BoatsUS 41

US 41

Masthead Yawl · Keel/centreboard · 1963–1967

A William H. Tripp Jr. designed masthead yawl with a keel-centerboard configuration for versatile deep-water performance

Designed by William H. Tripp Jr, built by Grampian Marine Ltd.

LOA
Beam
Draft (max)
Displacement
Hull type
Keel/Cbrd.

Is it for you?

Character

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

LivelySea-kindly

Her heavy displacement on a narrow beam gives 40 — a heavy, notably soft motion offshore.

Comfort ratio 40
CoastalBluewater

At 1.66 she sits well under the 2.0 line — a solidly ocean-capable hull for her size.

Capsize screening 1.66
LightHeavy

358 — very heavy for her waterline, a serious load-carrying cruiser.

Displacement / length 358
EasygoingPowered-up

15.6 — moderate power for her weight; steady, all-round performance.

Sail area / displacement 15.6

Built heavy and sea-kindly — a boat made to cross oceans and forgive a rough night.

  • Draws more than ~76% of boats her size on file

Compared with 260 boats of the same type within a quarter of her length.

The record

Full specifications

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

Dimensions
Weights
Rig & sail area
Rig
Masthead Yawl
Ratios
SA / displacement
15.6
Displacement / length
358.4
Comfort ratio
40.2
Capsize screening
1.66
Hull speed
7.5 kn
Pounds / inch immersion
1340
Hull
Hull type
Keel/Cbrd.
Construction
Fiberglass
Ballast type
Lead
Production
Years built
1963–1967
Designer
William H. Tripp Jr
Builder
Grampian Marine Ltd

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.

Pearson Yachts 4012.17 mSame hull family0.6 m shorterA 12-meter masthead sloop with a deep 2.87-meter draft and high ballast ratio, built for stability and speed
Bristol Yachts 41.112.54 mSame hull family0.2 m shorterA masthead sloop with a deep 3.05-metre keel-centerboard draft, bridging the gap between the 411 and 43.3 models
Brewer 4413.41 mSame hull family0.6 m longerA stretched evolution of the 12.8 featuring a reverse transom and a versatile keel-centerboard configuration
Southerly 42012.86 mSame hull familyNear-identical lengthA Rob Humphreys-designed fractional sloop featuring a versatile swing keel that later evolved into the Southerly 430
Bristol Yachts 45.513.79 mSame hull family1.0 m longerA heavy-displacement masthead sloop with a 3.35-metre keel-centerboard draft, built for deep-water cruising performance
Pearson Yachts 3510.67 mSame hull family2.1 m shorterBoasting the longest production run of any Pearson model, this keel/centerboard sloop remained largely unchanged for 14 years

The family

Related models

The designs closest to hers — usually the rest of the builder's range, sometimes the same hull sold under another name.

Keep looking

Nothing filmed of this one yet

Two ways to keep looking — both search what the fleet has actually recorded.

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