Design and Construction
Peterson's late-seventies lines gave the Formosa 46 a length-to-beam ratio of 3.56 and a ballast ratio of 30 percent, with roughly 10,000 pounds of lead on a 33,000-pound hull. The hull itself is solid fiberglass, and the yard assembled the boat from a three-piece joint bonding a separate hull, deck, and cabin house. Below the waterline the construction is solid fiberglass without core material, while the deck follows the marque's sandwich practice overlaid with teak. The fin keel draws between 6.46 and 6.76 feet depending on load, a figure that confines her to major marinas the boat can only enter major marinas as the draft is about 1.97 - 2.07 meter (6.46 - 6.76 ft) dependent on the load. The wetted surface measures about 570 square feet, and her immersion rate is a hefty 1,782 pounds per inch — a number that tells you how little she sits down when you load the lockers for a passage.
Rig and Handling
The sail-area-to-displacement ratio of 15.90 and a displacement-length ratio of 230, a combination the rating system labels "moderate racer" rather than heavy cruiser The DL-ratio for the Formosa 46 is 230 which categorizes this boat among 'moderate racers'. Her theoretical hull speed is 8.4 knots. The standing and running rigging dimensions are well documented: jib and genoa sheets run about 46 feet at 5/8-inch diameter, the mainsheet is a 115-foot line of the same diameter, and a spinnaker sheet stretches 101 feet. Those lengths speak to a large foretriangle and a boom that demands careful mainsheet management. The capsize screening value comes in at 1.63, a figure that by that formula alone would admit her to offshore events, and her Motion Comfort Ratio is 39.1 — moderate, not plush.
Accommodations
The 12.92-foot beam and 45-foot length provide the footprint of a sizable cruiser, and the 30-percent ballast ratio with 33,000 pounds displacement implies a stiff, settled platform rather than a featherweight weekender.
The Verdict
The Formosa 46 is a contradiction on paper: a Taiwan-built Peterson design with racer-derived ratios wrapped around cruiser-scale displacement and beam. She is a serious offshore-capable hull by the numbers, but her draft limits her to deep-water marinas and her comfort ratio sits in the middle of the range rather than at the soft end. For a buyer who wants Peterson's late-seventies performance thinking in a 45-foot fiberglass hull, she is a distinctive and defensible choice.
Pros
- Documented capsize screening value of 1.63 and Motion Comfort Ratio of 39.1 indicate offshore-suitable stability
- Moderate-racer DL and SA/D ratios suggest livelier handling than typical Taiwan cruisers
- Solid fiberglass hull below waterline with separate hull-deck-cabin joint construction
Cons
- Draft of 6.46–6.76 feet restricts her to major marinas
- Immersion rate of 1,782 lbs/inch shows she is a heavy platform with limited load tolerance before sitting deep
