Design and Construction
The hull is solid fiberglass with a solid fiberglass deck, and the keel is a full long-keel shape drawing between 4.0 and 4.3 feet depending on load — enough to let her tuck into shallow marinas as the draft is just about 4.00 - 4.30 ft dependent on the load anchor. Her length-to-beam ratio of 3.57 and displacement-length ratio of 356 confirm a narrow, weighty hull form rather than a beamy modern planing shape. A wetted bottom surface near 172 square feet and an immersion rate of about 535 pounds per inch speak to a hull that sits heavily and moves reluctantly when overloaded, but holds its trim in a seaway.
Rig and Handling
She is rigged as a masthead sloop, and the source's sheet recommendations are telling: a 67-foot mainsheet, 27-foot jib and genoa sheets, and a 59-foot spinnaker sheet, all in 3/8-inch diameter anchor. Those lengths suit a conventional sloop of this size with cockpit-led control lines. Under power, the Wickström engine yields a calculated maximum of about 3.4 knots, while a Saab installation is noted at 4.5 knots; her theoretical displacement hull speed is 6.0 knots. The capsize screening value of 1.60 and a Motion Comfort Ratio of 31.3 describe a stable, damped motion profile rather than a lively racer.
Accommodations
Below, the boat is equipped with two cabins and four berths, a layout consistent with a small family cruiser of the period. The accommodation count is a flat documented fact rather than an inferred arrangement, and the 45% ballast ratio together with the heavy-cruiser categorization supports a boat intended for settled coastal and modest offshore use rather than regatta sailing.
The Verdict
The Halcyon 27 is a traditional heavy-displacement long-keel cruiser of conservative Buchanan design. She is stable and shallow enough for marina access, but slow under her documented auxiliary power and built to an older specification than modern 27-footers.
Pros
- Long keel with 4.0–4.3 ft draft for shallow access and tracking
- Heavy-cruiser displacement and 45% ballast ratio for stable motion
- Two cabins and four berths in a simple cruising layout
Cons
- Wickström engine calculated max speed only about 3.4 knots
- High immersion rate shows she sits heavily when loaded
- Masthead sloop on a narrow hull with modest sail-area/displacement ratio of 13.03
