BoatsAdvance Sailboat Corp. Windmill

Advance Sailboat Corp. Windmill

Fractional Sloop · Dbrd. Dinghy · First built 1953

A Clark Mills-designed fractional sloop originally drawn for home builders using just four sheets of plywood

Designed by Clark Mills.

LOA
Beam
Draft (max)
Displacement
Hull type
Dbrd. Dinghy

Is it for you?

Character

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

TrailerableBeam 1.45 m — inside the 2.55 m no-permit tow width across most of Europe, and the 2.59 m US and Canadian limit. About 90 kg of hull, so roughly 700 kg on a trailer: check that against your own towing rating.Ramp-launchableAbout 90 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 0.15 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 moderate beam gives 3 — a quick, lively motion that feels every wave.

Comfort ratio 3
CoastalBluewater

At 3.26 she sits above the 2.0 line — beamy for her weight, and happiest coastal.

Capsize screening 3.26
LightHeavy

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

Displacement / length 29
EasygoingPowered-up

56.1 — a lot of sail for her weight; powered-up and eager, a real performer.

Sail area / displacement 56.1

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

  • Draws more than ~86% of boats her size on file
  • Narrower than ~81% of boats her size on file

Compared with 366 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
Fractional Sloop
Ratios
SA / displacement
56.1
Displacement / length
29.0
Comfort ratio
2.6
Capsize screening
3.26
Hull speed
5.1 kn
Pounds / inch immersion
246
Hull
Hull type
Dbrd. Dinghy
Construction
Wood
Production
Years built
First built 1953
Units built
5700
Designer
Clark Mills
Builder
Advance Sailboat Corp

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.

Several Under License 29er4.40 mSame hull family0.3 m shorterA high-performance skiff designed by Julian Bethwaite, featuring a powerful fractional rig for competitive racing
Spindrift 134.06 mSame hull family0.7 m shorterA Hubert Vandestadt-designed centerboard dinghy with a high sail-area-to-displacement ratio for lively, responsive sailing
LaserPerformance 49er4.88 mSame hull family0.2 m longerAn Olympic-class high-performance skiff featuring a massive sail-area-to-displacement ratio for elite racing
MacKay Boats Ltd. 49erfx4.88 mSame hull family0.2 m longerA high-performance skiff utilizing the 49er hull with a downsized rig specifically optimized for lighter crews
Ilca 4 (Laser 4.7)4.23 mSame hull family0.5 m shorterA Bruce Kirby-designed dinghy sharing the classic Laser hull, optimized with a smaller sail plan for lighter sailors
Alcort Sunfish4.24 mSame hull family0.5 m shorterWith a high sail-area-to-displacement ratio of 47.02, this nimble 4.24-meter dinghy remains a benchmark for simple

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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