Design and Construction
At just under 26 feet overall, with a 17.5-foot waterline, the Dark Harbor 17½ displaces 3,450 pounds and carries 1,400 pounds of lead ballast. Her ballast-to-displacement ratio is just over 40 percent, while her comfort ratio is near 23. Those numbers describe a stiff, settled little daysailer rather than a lightweight racer.
Crowninshield’s 1908 design was a deliberate throwback even in its own era, and the wooden construction is traditional in the fullest sense. A documented boatbuilding project for the 25-foot hull began by lofting the hull lines and building a strongback, then laminating the deckbeams and shaping the transom—the sequential, frame-first woodwork that defines the type.
Rig and Handling
The gaff-headed sloop rig is central to the Dark Harbor 17½’s character, and owners who love the boat cite the gaff specifically as part of her appeal. It spreads 310 square feet of sail. On a 3,450-pound hull, that produces a sail-area-to-displacement ratio of about 21.7—enough to move her briskly in a breeze without demanding a large crew.
Her full keel and hard turn of the bilge mark her as a stable, predictable handler, well suited to the daysailing role for which Crowninshield drew her.
Accommodations
The Dark Harbor 17½ is a relatively small boat, designed as a daysailer rather than a cruiser. The known construction sequence focuses on deckbeams and transom shaping rather than interior fit-out. What she offers is open, classic daysailing character in a wooden hull of manageable size, not cruising accommodations.
Refits and Ownership
Owning a Dark Harbor 17½ means accepting stewardship of a wooden boat, along with the upkeep inherent in the material. The class has a documented building method and a long production history across multiple builders.
With 200 hulls built and a fleet still active, the Dark Harbor 17½ remains a recognizable presence in traditional sailing circles. Surviving boats are found on both U.S. coasts, in Europe, and in the South Pacific—across three continents.
The Verdict
The Dark Harbor 17½ is a quietly authoritative example of the American wooden daysailer. Crowninshield’s 1908 lines combine a gaff rig with a full-keel hull and a hard turn of the bilge—qualities owners still celebrate. She is small, traditional, and built using a documented woodworking sequence. Some 200 were built, and the fleet remains active across three continents and on both American coasts.
Pros
- Classic Crowninshield design with a documented 1908 pedigree
- Some 200 hulls built
- Gaff-headed sloop rig, full keel, and hard turn of the bilge, all prized by owners
- Lead-ballasted hull with a settled, stiff daysailing temperament
- Active fleet on both U.S. coasts, in Europe, and in the South Pacific
Cons
- Wooden hull and deck require the upkeep inherent in the material
- Daysailer only, with no cruising accommodations
