Frostbite B Class

Frostbite B Class

Description

The Frostbite B Class (often called the Class B Frostbite Dinghy or B One-Design) is a historic one-design racing dinghy from the early frostbiting era of the 1930s, when sailors pioneered winter dinghy racing in cold-weather harbors along the U.S. East Coast (e.g., Long Island Sound, New England). Sponsored and popularized by Cornelius Shields (who "godfathered" the class in 1934), it was designed as a simple, affordable, high-performance dinghy for frostbite racing—short, intense winter series in small open boats despite freezing conditions. The class used wooden construction (some later in plywood or fiberglass), with a cat rig (single sail on a unstayed mast) or simple sloop setup, centerboard, and open cockpit for 1–2 sailors. It gained fame through events like the Eastern Frostbite Dinghy Regatta (starting 1933 in Essex, CT) and helped spark organizations like the MIT Nautical Association. Notable examples include Herreshoff-built hulls (e.g., Ankle Deep, a 1934 Class B preserved at the Herreshoff Marine Museum) and others displayed or raced at clubs. The class declined post-WWII as newer designs (e.g., Interclub Dinghy in 1946, sponsored by Shields to address B-class flaws like a fine bow leading to instability in breezes) emerged, but surviving B-class boats remain rare classics cherished for their role in frostbiting history.

Construction Details

Designer Unknown
Length 12.000 ft
LOA 12.000 ft
LWL 33.750 ft
Beam 4.700 ft
Max Draft 6.000 ft
Year Built 1934
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The standard boat dimensions

i -
j -
p 15.33 ft
e 9 ft
p2 -
e2 -
i2 -
j2 -

Sails

Frostbite B Class - MAINSAIL

Luff * 15.33 ft - (4673 mm)
Foot * 9 ft - (2743 mm)
Leech * 17.33 ft - (5282 mm)
Tack Angle * 87.97 °
Diagonal * 17.5 ft - (5334 mm)
Head (inches) * 4 in - (102 mm)
Area 68.87 ft²
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Disclaimer. Boats are not all the same -- even when produced in the same factory of the same model. Sailrite does its best to publish accurate dimensions, but we often find it worthwhile to have our customers measure their boats carefully before we produce kits for them. You should take the same precautions, especially when the data is not from Sailrite. The information on this site is not guaranteed to be accurate. Sailrite offers this content as a service to our community, but takes no responsibility for the reliability of the data provided.

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