Design and Construction
Cardell's late-seventies design pairs a hand-laid fiberglass hull with a fiberglass deck built as a sandwich, a construction choice the period review credits with improving the indoor climate below. The keel is iron, carrying a 35 percent ballast ratio against a displacement of roughly 3,439 pounds, and the fin-keel configuration gives a loaded draft of about 3.94 to 4.24 feet. With a beam of just over eight feet and a length-to-beam ratio of 2.62, the hull reads as narrow rather than beamy, while a displacement-length ratio near 241 places it among what one review termed "moderate racers." The wetted surface runs about 172 square feet, and the immersion rate of roughly 534 pounds per inch tells you how little it takes to change her waterline under load.
Rig and Handling
The Balaton 21 is a masthead sloop, and the same sources that detail her construction also record her sailing behavior in numbers. The capsize screening value comes in at 2.14, a figure the review notes as disqualifying for ocean races, while the Motion Comfort Ratio sits between 16.4 and 17.2. Her theoretical hull speed as a displacement hull of this length is 5.8 knots, and the Relative Speed Performance index is given as 58. The builder states these boats had and still have good sailing capabilities, and the 21's numbers describe a light, manageable coastal performer rather than an offshore voyager.
Accommodations
Below, the interior is mahogany, in keeping with many production boats of the era. The sandwich deck above and the modest 21-foot length frame a compact cabin intended for short stays and day sailing rather than extended cruising. The material character of the joinery and the climate-minded deck build define the belowdecks character.
The Verdict
The Balaton 21 is a small, well-defined seventies design from a named Swedish architect and Hungarian builder, with construction details and performance indices that mark her as a light coastal sloop. Her good sailing capabilities, per the builder, and her low draft suit sheltered waters, while her capsize screening and comfort numbers keep her firmly in the day- and weekender class.
Pros
- Hand-laid fiberglass hull with sandwich fiberglass deck
- Iron fin keel with 35 percent ballast ratio and shallow draft for marinas
- Builder-attributed good sailing capabilities across the model range
- Mahogany interior consistent with period production boats
Cons
- Capsize screening value of 2.14 excludes ocean-race acceptance
- Narrow beam and low comfort ratio limit extended cruising appeal
