Seller's Description
The K-38 is 38’ overall but 25’10” at the waterline, 8’ beam, 6’2” draft. Sail area 538 square feet. The exquisite beauty of the K38’s lines, its ideal size, its incredible feel of balance and speed, its sleek, narrow hull, its meticulous craftsmanship in wood and its silent, easy motion in a seaway combine to make it superior to all other yachts for sailing in Southern California’s waters. Designed by Paul Kettenburg, and built at the renowned Kettenburg Boat Works on Shelter Island, Chelsea is the 27th boat of this design built in 1954 of Carvel planked Mahogany. K-38’s are still recognized as the “Aristocrats of sail” on the Pacific Coast.
Her spruce mast was completely rebuilt in 2000, and is currently in the seller’s warehouse. It will be reinstalled on the boat at the time of a sale. The mast currently on the boat belongs to a different K-38. When the mast was rebuilt, it was Totally disassembled, re-glued, re-rabbitted, re-finished with varnish (Not paint) and re-wired at a cost of $10k.
A completely new transom was professionally installed along with the aft 3rd of the boat being replanked at the same time.
In 2004 the entire boat was gone through, and every rib was examined and sistered where needed. At that time, a custom brace that consists of a custom built rib which goes from the port shear clamp to the starboard shear clamp was installed to give added support to the mast step and floors in the area a around the mast. The turnbuckle transfers stress from the chain plate to a stainless steel “floor” which is bolted to a new oak floor in the bilge.
The boat was completely refastened and caulked before paint was applied.
Specs
- Designer
- Paul Kettenburg
- Builder
- Kettenburg Boats
- Association
- Kettenburg Boats & Owners Association
- # Built
- 40
- Hull
- Monohull
- Keel
- Fin
- Rudder
- ?
- Construction
- Wood
Dimensions
- Length Overall
- 37′ 11″ / 11.6 m
- Waterline Length
- 25′ 9″ / 7.9 m
- Beam
- 8′ 0″ / 2.4 m
- Draft
- 5′ 2″ / 1.6 m
- Displacement
- 12,000 lb / 5,443 kg
- Ballast
- ? (Lead)
Rig and Sails
- Type
- Sloop
- Reported Sail Area
- 561′² / 52.1 m²
- Total Sail Area
- 561′² / 52.1 m²
Mainsail
- Sail Area
- 284′² / 26.4 m²
- P
- 37′ 10″ / 11.6 m
- E
- 14′ 11″ / 4.6 m
- Air Draft
- ?
Foresail
- Sail Area
- 277′² / 25.7 m²
- I
- 41′ 3″ / 12.6 m
- J
- 13′ 4″ / 4.1 m
- Forestay Length
- 43′ 4″ / 13.2 m
Auxilary Power
- Make
- ?
- Model
- ?
- HP
- ?
- Fuel Type
- ?
- Fuel Capacity
- ?
- Engine Hours
- ?
Accomodations
- Water Capacity
- ?
- Holding Tank Capacity
- ?
- Headroom
- ?
- Cabins
- ?
Calculations
- Hull Speed
-
7.0 kn
Classic: 6.81 kn
Hull Speed
The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.
Formula
Classic hull speed formula:
Hull Speed = 1.34 x √LWL
A more accurate formula devised by Dave Gerr in The Propeller Handbook replaces the Speed/Length ratio constant of 1.34 with a calculation based on the Displacement/Length ratio.
Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio.311
Hull Speed = Max Speed/Length ratio x √LWL
- Sail Area/Displacement
-
17.1
Sail Area / Displacement Ratio
A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.
Formula
SA/D = SA ÷ (D ÷ 64)2/3
- SA: Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
- D: Displacement in pounds.
- Ballast/Displacement
- ?
Ballast / Displacement Ratio
A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.
Formula
Ballast / Displacement * 100
- Displacement/Length
-
311.2
300-400: heavy
Displacement / Length Ratio
A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.
Formula
D/L = (D ÷ 2240) ÷ (0.01 x LWL)³
- D: Displacement of the boat in pounds.
- LWL: Waterline length in feet
- Comfort Ratio
-
39.1
30-40: moderate bluewater cruising boat
Comfort Ratio
This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.
Formula
Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)
- D: Displacement of the boat in pounds
- LWL: Waterline length in feet
- LOA: Length overall in feet
- Beam: Width of boat at the widest point in feet
- Capsize Screening
-
1.4
<2.0: better suited for ocean passages
Capsize Screening Formula
This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.
Formula
CSV = Beam ÷ ³√(D / 64)
- Beam: Width of boat at the widest point in feet
- D: Displacement of the boat in pounds
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