Allegro (Westell)
Fractional Sloop · Twin keels · First built 1956
A John Westell-designed fractional sloop with twin keels, built for performance and shoal water access since 1956
Designed by John Westell, built by Honnor Marine Ltd.
- LOA
- Beam
- Draft (max)
- Displacement
- Ballast
- Hull type
- Twin Keel
Is it for you?
Character
Where this design lands on the numbers a shopper trusts — read straight from her own ratios.
TrailerableBeam 2.13 m — inside the 2.55 m no-permit tow width across most of Europe, and the 2.59 m US and Canadian limit. About 794 kg of hull, so roughly 1,400 kg on a trailer: check that against your own towing rating.Ramp-launchableAbout 794 kg of hull, with a keel that raises or a draft shallow enough to float off a trailer — she can go back on the trailer at the ramp, not only into the water.Shoal draftDraws 0.33 m, board up where she has one — creeks, sandbars and thin anchorages most keels have to stay out of.
LivelyComfort 11Sea-kindly
CoastalCapsize 2.33Bluewater
LightD/L 125Heavy
EasygoingSA/D 22.0Powered-up
TenderBallast 29%Stiff
Light and lively — happiest day-sailing and coastal-hopping in settled weather.
- Lighter than ~83% of boats her size on file
- Narrower than ~86% of boats her size on file
Compared with 665 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
Ballast / displacement
28.6%
Rig & sail area
Rig
Fractional Sloop
Ratios
SA / displacement
22.0
Displacement / length
125.0
Comfort ratio
10.6
Capsize screening
2.33
Hull speed
5.8 kn
Pounds / inch immersion
461
Hull
Hull type
Twin Keel
Construction
Cold Molded Mahogany
Ballast type
Iron
Production
Years built
First built 1956
Designer
John Westell
Builder
Honnor 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.
J Boats J/706.93 mSame hull family0.6 m longerA high-performance fractional sloop designed by Alan Johnstone, with over 1,100 units delivered for one-design racing
Bavaria Yachts 6066.50 mSame hull family0.2 m longerA lightweight 6.5-meter fractional sloop with a high sail-area-to-displacement ratio for spirited coastal sailing
Borge Bringsvaerd Bb116.18 mSame hull familyNear-identical lengthA Norwegian-built classic with an active class association that has raced continuously since the 1960s
J Boats Tillotson Pearson J/247.32 mSame hull family1.0 m longerThe world's most popular one-design keelboat, featuring a light 1406kg displacement for responsive, agile handling
Halcyon 236.93 mSame hull family0.6 m longerA triple-keeled masthead sloop by Alan H. Buchanan, offering shallow-draft versatility based on the earlier Crystal 23
Martinique 257.70 mSame hull family1.4 m longerA Brazilian-built masthead sloop with a 44% ballast ratio, offering a stiff and stable platform for coastal cruising
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.
Nova 27A 1971 John Westell masthead sloop featuring a fin keel and transom-hung rudder designed for stable coastal cruisingWesterly 28A John A. Butler-designed masthead sloop featuring a shallow 0.76m draft and a fin keel with a spade rudderWesterly 25A triple-keel masthead sloop with a shallow 0.76m draft, designed by company founder Denys Rayner for coastal cruising
Keep looking
Nothing filmed of this one yet
Two ways to keep looking — both search what the fleet has actually recorded.
The newsletter
New boats, new stories, from everywhere.
One email from the fleet — boats newly added, videos newly analyzed. No noise.