Kettenburg 40 Sailboat Review, Specs, and Listings

Design and Construction

The K-40 is built in mahogany on oak frames using carvel planking, with a solid wood hull and wood deck. At 39.83 feet overall, 27.33 feet on the waterline, 10.33 feet of beam, and 14,250 pounds displacement with 5,000 pounds of lead ballast, the boat carries a ballast-displacement ratio near 35 percent and a capsize ratio of 1.7 — numbers that, with the reassuring stability Sailboat Data & Sail Specifications records, place her firmly in the fast cruiser-racer category rather than the lightly built racer camp. Sailboat Data & Sail Specifications describes the design as prioritizing seaworthiness, speed, easy handling, and beauty as a fast cruiser/racer, and notes many hulls were commissioned for serious cruising while remaining competitive.

Rig and Handling

As a masthead sloop the K-40 carries a generous sail plan built around a 43-foot I dimension and a 37-foot main luff, with a 150-percent genoa of roughly 475 square feet and a 968-square-foot spinnaker for downwind work. That area forward of the mast is the reason Sailboat Data & Sail Specifications credits the class with excellent light-air performance, while the same review describes a comfortable motion in all conditions. Not every boat left the factory as a pure sloop: some carry cutter elements, and individual hulls were later converted — hull #3 is a cutter, and hull #7 became a cutter-rigged sloop. The variety reflects owners tailoring the rig to their own cruising or racing needs without leaving the original design's balance behind.

Accommodations and Refit History

Owners' records show the interior adapting to long service rather than a fixed factory plan. Hull #26 received custom cabinetry in the saloon, nav station, galley, head, and V-berth, with a redesigned nav station and head during a five-year restoration that also renewed ribs, floors, keel bolts, and all fastenings. Hull #37 remains essentially original apart from a Groco head, added holding tank, and teak-and-holly sole. The pattern across the fleet is one of sympathetic updating — new plumbing and electrical systems on #26, a Volvo Penta replacing the original Gray Marine on #37 — rather than wholesale redesign, which tells a buyer the baseline layout was serviceable enough to keep.

Racing Pedigree

The class earned its reputation on the racecourse. Hull #4 took the San Francisco Bay Yankee Cup in 1978, hull #9 compiled an extensive Puget Sound record including Swiftsure from 1960 through 1964 and NorPac, and hull #25 won the LA–Mazatlan Race outright in 1961 before taking third in 1963. The unknown hull registered as MAMIE ran Transpac in 1963, 1965, 1969, 1971, 1973, and 1975 with a second overall, while hull #16 raced several TransPacs successfully and hull #34 collected McNich classic wins including the Strathmore Cup in 2007. That spread of results across five decades is the clearest evidence of the fast cruiser-racer intent holding up in practice.

Ownership and Restoration Trail

Individual histories illustrate the long arc of ownership. Hull #1, originally Tomboy II and retained by the factory as a prototype before becoming Aladdin's Lamp, spent 18 years with Rudy Severns in slow restoration in Cottage Grove, Oregon, and was later moved to Bellingham, Washington for final work. Hull #31 was built for James E. Doane of Chicago, sailed the Great Lakes for roughly 20 years, reportedly circled the South Pacific and Hawaii, then was restored to bristol condition by William E. Harris from 1998 to 2004. Hull #36 required 53 frame replacements below the waterline, seven planks, and full spline work in 2003. These accounts are a useful counterweight to the romantic West Coast racing image: the boats demand committed wood maintenance.

The Verdict

The Kettenburg 40 is a wooden cruiser-racer with a genuine Transpac and offshore record, a seakindly motion, and a sail plan that performs in light air. The carvel mahogany hull demands the attention any wooden boat requires, but the fleet's survival — with hulls still racing and winning classics past their fiftieth year — argues for a design that rewards the effort.

Pros