505

I have this for sale

Built by Various (amateur or kit built) • Designed by John Westell/Austin Farrar

General Information

Hull Type: Centerboard Dinghy

Rigging Type: Fractional Sloop

Construction: Wood/FG

First Built: 1954

Number Built: 9100

Dimensions

Length Overall (LOA): 5.03 m

Length Waterline (LWL): 4.57 m

Beam: 1.88 m

Draft (Max): 1.42 m

Draft (Min): 0.15 m

Weight & Ballast

Displacement: 127 kg

Sail Plan

Sail Area (reported): 16.26 m²

Performance Ratios

On the numbers, 505 rates as ultralight (D/L 37). Its comfort ratio of 2.5 is in the "lightweight racing" band; its capsize screening value of 3.78 is in the "above the guideline" band. Against its peers, Comfort ratio stands out: lower than 96% of the 374 monohulls between 4.4 m and 5.6 m in our catalogue.

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

Hull Speed: 5.19 knots

SA/Displacement (Reported): 65.49

Displacement/Length: 37.04

D/L 37 — ultralight. Lower than 91% of the 374 monohulls between 4.4 m and 5.6 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: 2.47

Comfort ratio 2.5 — lightweight racing. Lower than 96% of the 374 monohulls between 4.4 m and 5.6 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: 3.78

Capsize screening 3.78 — above the guideline. Higher than 92% of the 492 monohulls between 4.4 m and 5.6 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: 59 kg/cm