Impulse Marine 21
Fractional Sloop · Fin keel, spade rudder · First built 1986
A William E. Cook-designed fractional sloop with a high sail-area-to-displacement ratio built for spirited performance
Designed by William E. Cook.
- LOA
- Beam
- Draft (max)
- Displacement
- Ballast
- Hull type
- Fin w/spade Rudder
Is it for you?
Character
Where this design lands on the numbers a shopper trusts — read straight from her own ratios.
Her light displacement on a beamy beam gives 7 — a quick, lively motion that feels every wave.
At 2.93 she sits above the 2.0 line — beamy for her weight, and happiest coastal.
92 — light for her waterline, so she is easily driven and quick to accelerate.
27.9 — a lot of sail for her weight; powered-up and eager, a real performer.
46% of her weight is ballast — stiff, standing up well to her sails.
Light and lively — happiest day-sailing and coastal-hopping in settled weather.
- Lighter than ~94% of boats her size on file
Compared with 768 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.
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.
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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