BoatsKettenburg Marine 41

Kettenburg Marine 41

Masthead Sloop · Fin keel, spade rudder · 1966–1969

A 1966 masthead sloop with a spade rudder, offering a light displacement-to-length ratio for responsive coastal sailing

Designed by Paul Kettenburg.

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.

LivelySea-kindly

Her heavy displacement on a narrow beam gives 33 — a sea-kindly motion in a seaway.

Comfort ratio 33
CoastalBluewater

At 1.68 she sits well under the 2.0 line — a solidly ocean-capable hull for her size.

Capsize screening 1.68
LightHeavy

322 — heavy for her waterline, built to carry stores and ride steadily.

Displacement / length 322
EasygoingPowered-up

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

Sail area / displacement 16.5
TenderStiff

33% of her weight is ballast — on the tender side; she'll heel readily and want a reef sooner.

Ballast 33%

Built heavy and sea-kindly — a boat made to cross oceans and forgive a rough night.

  • Draws less than ~79% of boats her size on file
  • Narrower than ~89% of boats her size on file

Compared with 2723 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
33.3%
Rig & sail area
Rig
Masthead Sloop
Ratios
SA / displacement
16.5
Displacement / length
322.0
Comfort ratio
32.8
Capsize screening
1.68
Hull speed
7.0 kn
Pounds / inch immersion
1015
Hull
Hull type
Fin w/spade rudder
Construction
FG/wood deck
Ballast type
Lead
Production
Years built
1966–1969
Units built
30
Designer
Paul Kettenburg
Builder
Kettenburg Marine

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.

Dufour Yachts 4112.50 mSame hull familyNear-identical lengthA 1971 masthead sloop with a skeg-mounted rudder, offered in both sloop and ketch configurations for versatile cruising
Feeling 41612.57 mSame hull familyNear-identical lengthA 12.57-metre masthead sloop with a 1.93m fin keel, designed for offshore stability with a 23.7 comfort ratio
Jeanneau Sun Legende 4112.44 mSame hull familyNear-identical lengthA Doug Peterson-designed 1-ton prototype offering a performance-oriented hull available in Regate and cruising variants
Caliber Yachts 40 LRC12.47 mSame hull familyNear-identical lengthA 1995-launched cutter with a 44% ballast ratio and a 1.55m draft, engineered for long-range offshore self-sufficiency
Linjett 4012.35 mSame hull family0.2 m shorterA decade-long production run defines this 12-metre performance cruiser, balancing a 44% ballast ratio for stiff sailing
Jeanneau Voyage 12.512.50 mSame hull familyNear-identical lengthA 12.5-meter masthead sloop with a 1.65-meter draft that served as the predecessor to the Sun Odyssey 42

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

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