Designed by the renowned C. William Lapworth and built by Jensen Marine from 1969 to 1976, this compact fractional sloop represents an interesting chapter in California's sailboat manufacturing history. With 500 hulls produced during its seven-year run, the Cal 21 carved out a niche as an affordable entry-level sailboat that didn't compromise on sailing performance. The boat's most distinctive feature is its swing keel design, which allows the 4.30-foot draft to be reduced for shallow water exploration and trailering convenience. At just 1,100 pounds displacement with 360 pounds of ballast, this lightweight fiberglass construction delivers spirited performance while remaining manageable for new sailors. The 196 square feet of sail area provides adequate power for coastal cruising and daysailing adventures. Lapworth's design philosophy emphasized clean lines and efficient sailing characteristics, evident in the boat's respectable hull speed of 5.47 knots and favorable sail area to displacement ratio of 29.49. The low comfort ratio of 7.61 and moderate capsize screening value of 2.59 indicate this vessel is best suited for protected waters, coastal daysailing, and short cruises rather than extended offshore passages. For sailors seeking an affordable, trailerable boat with classic 1970s styling and proven sailing ability, the Cal 21 offers genuine appeal.
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What is the Cal 21's sail area to displacement ratio?
The Cal 21 has a Sail Area to Displacement ratio (SA/D) of 29.49. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.
What is the Cal 21's comfort ratio?
The Cal 21 has a Ted Brewer Comfort Ratio of 7.61. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.
Is the Cal 21 safe for offshore sailing?
The Cal 21 has a Capsize Screening Formula value of 2.59. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.
What is the hull speed of the Cal 21?
The theoretical hull speed of the Cal 21 is 5.47 kn knots, calculated from its waterline length.
How much does a Cal 21 weigh?
The Cal 21 has a displacement of 1,100.00 lb and a length overall (LOA) of 20.50 ft.
Who designed the Cal 21?
The Cal 21 was designed by C. William Lapworth, first built in 1969.