Originally designed by John Westell and Austin Farrar in 1954, this high-performance dinghy has become one of sailing's most celebrated racing classes with over 9,100 boats built worldwide. The 505's fractional sloop rig and centerboard configuration create an exceptionally responsive sailing machine that rewards skilled handling with exhilarating performance. At 16.5 feet overall with a relatively light 280-pound displacement, this boat delivers impressive speed potential with a sail area-to-displacement ratio of 65.49. The substantial 175 square feet of sail area provides plenty of power, while the 4.67-foot draft centerboard offers excellent upwind performance and shallow-water versatility. The 6.18-foot beam strikes an optimal balance between stability and speed. Built in both wood and fiberglass construction by various manufacturers, the 505 has maintained remarkably consistent design standards across its seven-decade production run. This boat excels in competitive fleet racing and spirited day sailing, particularly suited for experienced sailors who appreciate responsive handling and tactical sailing. The combination of its proven pedigree, active international racing circuit, and thrilling performance characteristics makes the 505 an outstanding choice for sailors seeking serious racing capability in a manageable package.
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What is the 505's sail area to displacement ratio?
The 505 has a Sail Area to Displacement ratio (SA/D) of 65.49. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.
What is the 505's comfort ratio?
The 505 has a Ted Brewer Comfort Ratio of 2.47. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.
Is the 505 safe for offshore sailing?
The 505 has a Capsize Screening Formula value of 3.78. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.
What is the hull speed of the 505?
The theoretical hull speed of the 505 is 5.19 kn knots, calculated from its waterline length.
How much does a 505 weigh?
The 505 has a displacement of 280.00 lb and a length overall (LOA) of 16.50 ft.
Who designed the 505?
The 505 was designed by John Westell/Austin Farrar, first built in 1954.