Designed by Robert Humphries and built by Fairey Allday Ltd. in the UK starting in 1978, this 31-footer represents classic British yacht design philosophy of the late 1970s. The Mistral 31 combines moderate displacement with a modern fin keel and spade rudder configuration, delivering responsive handling characteristics that made it appealing to both cruising sailors and club racers. With a comfort ratio of 16.22, the Mistral 31 sits in the sweet spot for coastal cruising, offering enough stability and seaworthiness for extended passages while maintaining the performance edge that makes daysailing enjoyable. The fractional sloop rig provides excellent balance and sail handling ease, while the fiberglass construction ensures durability and lower maintenance compared to traditional materials of the era. The hull's proportions suggest a yacht optimized for British and European coastal conditions, where versatility between harbor racing and weekend cruising was highly valued. Her SA/Displacement ratio of 20.9 indicates spirited performance in moderate conditions, while the capsize screening formula of 2.25 reflects reasonable stability for coastal and offshore work. This combination of characteristics made the Mistral 31 a practical choice for sailors seeking a boat capable of club racing success and comfortable family cruising.
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What is the Mistral 31's sail area to displacement ratio?
The Mistral 31 has a Sail Area to Displacement ratio (SA/D) of 20.9. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.
What is the Mistral 31's comfort ratio?
The Mistral 31 has a Ted Brewer Comfort Ratio of 16.22. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.
Is the Mistral 31 safe for offshore sailing?
The Mistral 31 has a Capsize Screening Formula value of 2.25. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.
What is the hull speed of the Mistral 31?
The theoretical hull speed of the Mistral 31 is 6.52 kn knots, calculated from its waterline length.
How much does a Mistral 31 weigh?
The Mistral 31 has a displacement of 6,000.00 lb and a length overall (LOA) of 31.10 ft.
Who designed the Mistral 31?
The Mistral 31 was designed by Robert Humphries, first built in 1978.