Designed as a compact and accessible keelboat, the US 21 offers an approachable entry point into keel-boat sailing without sacrificing the satisfaction of genuine performance on the water. Built for lake and coastal sailing, this small one-design vessel strikes a balance between ease of handling and enough responsiveness to keep experienced sailors engaged. Its manageable size makes it a practical choice for sailors who want the stability of a keel without the complexity and cost of a larger cruising boat. The US 21 has found a following among sailors who appreciate fleet racing in a class-oriented environment, where skill and tactics matter more than equipment advantages. Its one-design nature levels the playing field and fosters competitive, close racing that appeals to both developing sailors and seasoned racers looking for an affordable, low-maintenance platform. Day sailing and casual coastal cruising are also well within its capabilities, making it a versatile option for those who want a single boat that can serve multiple purposes. For buyers seeking a social, class-supported sailing experience with straightforward ownership, the US 21 is worth a closer look.
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What is the Us 21's sail area to displacement ratio?
The Us 21 has a Sail Area to Displacement ratio (SA/D) of 24.77. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.
What is the Us 21's comfort ratio?
The Us 21 has a Ted Brewer Comfort Ratio of 8.67. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.
Is the Us 21 safe for offshore sailing?
The Us 21 has a Capsize Screening Formula value of 2.68. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.
What is the hull speed of the Us 21?
The theoretical hull speed of the Us 21 is 5.69 knots, calculated from its waterline length.
How much does a Us 21 weigh?
The Us 21 has a displacement of 1,700.00 lb and a length overall (LOA) of 21.25 ft.