Design and Construction
The Mottle 33 is a solid-fiberglass monohull with a fiberglass deck and a fin keel carrying lead ballast. It measures just over 32 feet on the waterline and 10 feet 9 inches in beam. Its length-to-beam ratio of 3.05 makes it more spacious than 66% of similar sailboat designs.
The ballast ratio is 54 percent—higher than 95 percent of similar sailboats—while the displacement-length ratio of 150 places the Mottle 33 among the “light racers.” The combination of a heavy lead bulb and a comparatively light shell gives the design a stiff, purposeful stance without pushing it into extreme racing fragility.
Rig, Handling, and Machinery
The Mottle 33 carries a masthead sloop rig. Its standing and running gear follow period proportions: jib and genoa sheets use about 10 meters of 12 mm line, the mainsheet is a long 25-meter run of 12 mm line, and the spinnaker sheets measure 22 meters.
The fin keel draws roughly 5.2 feet, varying slightly with load, which keeps the yacht within most marina depths. A spade rudder and moderate wetted surface of about 34 m2 (365 ft2) contribute to a manageable, responsive feel in sheltered waters.
Under power, a shaft-drive diesel—sometimes a Bukh DV24 rated at 24 hp—pushes the hull to a calculated 6.6 knots. The theoretical displacement hull speed is 7.4 knots. The straightforward machinery keeps the systems understandable for an owner comfortable with basic diesel and rigging care, and the Bukh DV24 remains a period-correct option where fitted.
Performance Profile
The Mottle 33’s sail-area-to-displacement ratio is 17.24. Immersion is about 1,130 pounds per inch, so the yacht settles noticeably under stores but retains a lively response to sail pressure.
Its Motion Comfort Ratio is 19.3, making it more comfortable than only 21 percent of similar designs. In practical terms, the ride is firm rather than plush. The capsize screening value is 2.05, a figure that indicates the boat would not be accepted to participate in ocean races under that metric.
Accommodations and Tankage
Below, the Mottle 33 has two cabins and five berths, along with a galley and a toilet. The arrangement suits short family cruises or a couple sailing with guests. The volume implied by the length-to-beam ratio suggests an open, usable interior rather than a cramped pocket cruiser.
Tankage comprises 400 liters of fresh water and 120 liters of diesel. The water supply is also stated as 90 gallons and is generous for a boat of this length.
The Verdict
The Mottle 33 is a specialized Australian light-displacement cruiser-racer with exceptional ballast stability and a roomy beam. Its main compromises are a comfort ratio that favors speed over a smooth ride and a capsize score that rules out compliance with offshore racing requirements under that metric.
For a coastal sailor who values stiffness and space in a compact, simple package, it’s a thoughtful choice.
Pros
- Lead-ballasted fin keel and a 54 percent ballast ratio, rare among its peers
- Beam-driven interior space exceeding that of 66 percent of similar designs
- Simple fiberglass construction and shaft-drive diesel for straightforward upkeep
Cons
- Motion Comfort Ratio below that of 79 percent of comparable sailboats
- Capsize screening value excludes participation in ocean races under that metric
