5.5 Meter

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General Information

Hull Type: Fin Keel

Rigging Type: Fractional Sloop

Construction: Wood/FG

First Built: 1949

Number Built: 800

Dimensions

Length Overall (LOA): 9.91 m

Length Waterline (LWL): 7.01 m

Beam: 1.98 m

Draft (Max): 1.35 m

Weight & Ballast

Displacement: 1,814 kg

Ballast Type: Lead

Sail Plan

Sail Area (reported): 28.80 m²

Performance Ratios

On the numbers, 5.5 Meter rates as light (D/L 147). Its comfort ratio of 19.8 is in the "lightweight racing" band; its capsize screening value of 1.64 is in the "meets the common offshore guideline" band. Against its peers, Capsize screening stands out: lower than 92% of the 1988 monohulls between 8.9 m and 10.9 m in our catalogue.

Ratios use published displacement (often light ship) and reported sail area; see Sources & methodology.

Hull Speed: 6.43 knots

SA/Displacement (Reported): 19.74

Displacement/Length: 146.77

D/L 147 — light. Lower than 90% of the 1949 monohulls between 8.9 m and 10.9 m in our catalogue. Displacement relative to waterline length: low numbers mean a light boat that accelerates and planes easily, high numbers a heavy boat that carries its weight through a seaway.

Comfort Ratio: 19.75

Comfort ratio 19.8 — lightweight racing. Lower than 75% of the 1949 monohulls between 8.9 m and 10.9 m in our catalogue. An estimate of motion comfort in waves from displacement, beam and length: higher values suggest a slower, gentler motion.

Capsize Screening: 1.64

Capsize screening 1.64 — meets the common offshore guideline. Lower than 92% of the 1988 monohulls between 8.9 m and 10.9 m in our catalogue. A screening formula from beam and displacement: lower is better, and values under 2.0 are the common guideline for offshore boats.

Immersion: 95 kg/cm

Notes

Dimensions are approximate since this is a development class. (The formula, introduced in 1949, incorporates elements of the square meter and international rules. Adopted as an Olympic class beginning in 1952. Although it was replaced (with the SOLING) in 1968, the class is still active in many parts of Europe.