BoatsSparta 1/4 Ton

Sparta 1/4 Ton

Masthead Sloop · Fin With Rudder On Skeg · First built 1974

An IOR 18-foot rated racer based on the Achilles 24 hull, optimized for the 1/4 Ton class since 1974

Designed by Oliver Lee & Chris Butler, built by Butler Mouldings Ltd.

LOA
Beam
Draft (max)
Displacement
Ballast
Hull type
Fin With Rudder On Skeg

Is it for you?

Character

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

TrailerableBeam 2.16 m — inside the 2.55 m no-permit tow width across most of Europe, and the 2.59 m US and Canadian limit. About 1,089 kg of hull, so roughly 1,700 kg on a trailer: check that against your own towing rating.
LivelySea-kindly

Her light displacement on a moderate beam gives 14 — a quick, lively motion that feels every wave.

Comfort ratio 14
CoastalBluewater

2.12 — right around the 2.0 line, the edge between coastal and offshore.

Capsize screening 2.12
LightHeavy

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

Displacement / length 156
EasygoingPowered-up

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

Sail area / displacement 15.8
TenderStiff

46% of her weight is ballast — stiff, standing up well to her sails.

Ballast 46%

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

  • Lighter than ~77% of boats her size on file
  • Narrower than ~86% of boats her size on file

Compared with 946 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
45.8%
Rig & sail area
Rig
Masthead Sloop
Ratios
SA / displacement
15.8
Displacement / length
156.2
Comfort ratio
13.7
Capsize screening
2.12
Hull speed
5.8 kn
Pounds / inch immersion
481
Hull
Hull type
Fin with rudder on skeg
Construction
Fiberglass
Production
Years built
First built 1974
Units built
12
Designer
Oliver Lee, Chris Butler
Builder
Butler Mouldings 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.

Bavaria Yachts 6066.50 mSame hull family0.2 m shorterA lightweight 6.5-meter fractional sloop with a high sail-area-to-displacement ratio for spirited coastal sailing
J J/77.04 mSame hull family0.3 m longerA 2024 fractional sloop with a shallow 1.16m draft and a high 23.55 sail-area-to-displacement ratio for responsive daysailing
Sirius 7277.27 mSame hull family0.6 m longerA development of the Sirius 24, this fractional sloop features a fin keel with skeg-mounted rudder for balanced handling
J Boats Tillotson Pearson J/247.32 mSame hull family0.6 m longerThe world's most popular one-design keelboat, featuring a light 1406kg displacement for responsive, agile handling
Dehler Yachts 25CR7.50 mSame hull family0.8 m longerA Van de Stadt-designed fractional sloop with a high sail area-to-displacement ratio built for spirited performance
Ranger Yachts 237.21 mSame hull family0.5 m longerDesigned to rate at the IOR 18-foot level, this masthead sloop offered an optional tall rig starting in 1974

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.

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