BoatsSnapdragon 670

Snapdragon 670

Masthead Sloop · Twin keels · First built 1963

A David Feltham-designed twin-keeler built for shoal-water exploration and stable coastal cruising

Designed by David Feltham & Thames Marine.

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 2.44 m — inside the 2.55 m no-permit tow width across most of Europe, and the 2.59 m US and Canadian limit. About 1,470 kg of hull, so roughly 2,050 kg on a trailer: check that against your own towing rating.Shoal draftDraws 0.81 m, board up where she has one — creeks, sandbars and thin anchorages most keels have to stay out of.
LivelySea-kindly

Her moderate displacement on a beamy beam gives 16 — a quick, lively motion that feels every wave.

Comfort ratio 16
CoastalBluewater

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

Capsize screening 2.17
LightHeavy

211 — moderately heavy for her waterline, a balanced cruising weight.

Displacement / length 211
EasygoingPowered-up

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

Sail area / displacement 17.4
TenderStiff

45% of her weight is ballast — stiff, standing up well to her sails.

Ballast 45%

A balanced, easily-driven cruiser — comfortable and forgiving for coastal work.

  • Draws less than ~88% 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
44.8%
Rig & sail area
Rig
Masthead Sloop
Ratios
SA / displacement
17.4
Displacement / length
210.9
Comfort ratio
15.8
Capsize screening
2.17
Hull speed
5.8 kn
Pounds / inch immersion
543
Hull
Hull type
Twin Keel
Construction
Fiberglass
Production
Years built
First built 1963
Designer
David Feltham, Thames Marine
Builder
Thames Marine

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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