Designed by Frank V. Butler and built by Russell Marine in the UK starting in 1975, this compact 21.5-foot sailboat represents British craftsmanship from an era when thoughtful design maximized utility in smaller packages. The fiberglass construction ensures durability while keeping maintenance manageable for weekend sailors and coastal cruisers. The boat's swing keel configuration offers exceptional versatility, allowing access to shallow anchorages and simplified trailering while maintaining respectable sailing performance when fully deployed. With a 3.8-foot draft when the keel is down, it provides adequate stability for coastal sailing, while the masthead sloop rig delivers straightforward sail handling that appeals to both novice and experienced sailors. At 2,250 pounds displacement with 205 square feet of sail area, this design strikes a practical balance between performance and comfort. The moderate sail area-to-displacement ratio of 19.15 suggests spirited sailing in light to moderate conditions without being overpowering for less experienced crews. The comfort ratio of 11.53 indicates this boat prioritizes sailing efficiency over heavy-weather comfort, making it ideal for day sailing and weekend coastal adventures rather than extended offshore passages. The capsize screening value of 2.34 reflects reasonable stability for protected waters and moderate conditions.
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What is the Alacrity 670 Alacrity 22's sail area to displacement ratio?
The Alacrity 670 Alacrity 22 has a Sail Area to Displacement ratio (SA/D) of 19.15. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.
What is the Alacrity 670 Alacrity 22's comfort ratio?
The Alacrity 670 Alacrity 22 has a Ted Brewer Comfort Ratio of 11.53. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.
Is the Alacrity 670 Alacrity 22 safe for offshore sailing?
The Alacrity 670 Alacrity 22 has a Capsize Screening Formula value of 2.34. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.
What is the hull speed of the Alacrity 670 Alacrity 22?
The theoretical hull speed of the Alacrity 670 Alacrity 22 is 5.89 kn knots, calculated from its waterline length.
How much does a Alacrity 670 Alacrity 22 weigh?
The Alacrity 670 Alacrity 22 has a displacement of 2,250.00 lb and a length overall (LOA) of 21.50 ft.
Who designed the Alacrity 670 Alacrity 22?
The Alacrity 670 Alacrity 22 was designed by Frank V. Butler, first built in 1975.