For sailors comparing a classic, full-keel-era alternative with later, beamier designs, the Bianca 36 is best considered a purposeful, offshore-minded cruiser rather than a weekend racer.
Design and Construction
The Bianca 36 has a length-to-beam ratio of 3.41 and a displacement-to-length index of 369, placing her firmly among what the design data calls “ultra heavy cruisers”. Her ballast ratio is 43 percent. The iron fin keel draws between six and 6.3 feet, depending on load, so she needs the deeper visitors’ berths at major marinas rather than the shallow end of the fuel dock.
The hull is solid fiberglass, with a wetted surface of roughly 312 square feet. Each inch of sinkage requires about 894 pounds of added load, a figure that speaks to a volume that does not perk up lightly when stores are added.
A capsize screening value of 1.68 and a motion comfort ratio near 34.4 suggest a stable, damped motion profile in a seaway rather than a lively one.
Rig and Handling
The Bianca 36 carries a masthead sloop rig, and the numbers tell a candid story about her sail plan. Her sail-area-to-displacement ratio is 14.3 with the ISO reference sail and 17.2 with a 135 percent genoa. In a rig comparison, she carries more sail than only 24 percent of similar boats—a clear sign that she is significantly underrigged, as yachtdatabase.com’s review found.
The theoretical hull speed is 6.8 knots, but the calculated maximum is about 5.1, while the relative speed performance index is 54. Together, those figures describe a boat that prefers to be kept moving with a full genoa rather than hurried under the mainsail alone.
The halyard and sheet dimensions are worth noting when planning a re-rig. The mainsail, jib, and spinnaker halyards are each about 101.8 feet long and 3/8 inch in diameter. The genoa sheet is 34.3 feet long, while the mainsheet is 85.8 feet; both are half-inch diameter.
Accommodations
Below, the Bianca 36 has six berths, a galley, and a toilet facility. The arrangement suits a family or a crewed passage plan rather than a minimalist solo layout. That berth count is consistent with her heavy-cruiser brief: the design gives space to living aboard and seakeeping rather than stripping out accommodation for the racecourse.
Verdict
The Bianca 36 is a thoughtfully proportioned, heavy-displacement cruiser from the Sparkman & Stephens drawing board, built by a Danish yard during its transition to fiberglass construction. She is stable and commodious, but her underrigged sail plan means a prudent owner will carry and use a genoa. She is a known quantity on the used market under two names, and her limitations are clear in her design numbers.
Pros
- Iron fin keel, 43 percent ballast ratio, and a reassuring motion comfort index near 34.4
- Six berths, a galley, and a head suited to extended cruising or family use
- Solid fiberglass hull from a recognized Danish builder
Cons
- Significantly underrigged for her displacement and needs a genoa to perform
- Draft of six feet or more limits marina access to deeper berths
- Calculated top speed of about 5.1 knots trails the theoretical hull speed
