Design and Construction
Both hull and deck are hand-laid fiberglass, but the deck alone is a balsa-cored sandwich. That sandwich is not merely a weight-saving measure; the builder used it to insulate the cabin against cold water and cut condensation when the sea runs colder than the air below. The balsa core, however, demands care: any through-deck modification needs careful sealing, since water ingress into the core invites rot. The keel is lead on a fin, and the boat draws between 4.92 and 5.22 feet depending on load. At 7,716 pounds displacement with 3,351 pounds of ballast, the H-35 sits in the moderate-racer band with a displacement-length ratio of 184.
Rig and Handling
The H-35 was offered with more than one rig, each a fractional sloop. The standard fractional rig carries 390.7 square feet of mainsail and jib, while an alternative fractional rig reduces that to 355.2 square feet. The sail-area-to-displacement ratio is 16.0 on the ISO reference sail and rises to 18.8 with a 135 percent genoa, and the design is noted as carrying more rig than 82 percent of comparable sailboats — significantly overcanvased for its size. With a theoretical hull speed of 6.9 knots and a capsize screening value of 1.73, the hull is a steady coastal performer rather than an offshore survivor by modern metrics. The motion comfort ratio of 23.6 and an immersion rate of about 790 pounds per inch round out a picture of a stiff, moderate-volume hull with a wetted surface near 269 square feet.
Accommodations
Below, the H-35 sleeps five across a teak interior and carries a galley and a toilet. Fresh water is limited to 60 liters, a modest sum for a boat of this berth count and a real constraint on extended anchorages without replenishment. The cabin climate benefits from the insulated deck described above, making the belowdecks space more tolerable in cold-water cruising than a solid-laminate deck would allow.
Equipment and Power
Engine choices varied by hull, but the options center on Yanmar diesels — the YS8M inboard or an 8-horsepower Yanmar unit — turning a shaft drive. With the 8-horsepower Yanmar the boat makes 6.0 knots. The fuel tank is steel and holds 30 liters, a small reserve that suits day sailing and short hops more than long motoring legs.
Known Issues
The principal structural caveat is the balsa-cored deck. Because balsa is used as the sandwich core, special care must be taken with any penetration of the deck structure to keep water out of the core. A buyer or owner should treat deck fittings, winch bolts, and through-deck hardware as potential ingress points.
The Verdict
The H-35 is a thoughtfully engineered Scandinavian cruiser-racer: Groop's hull pairs a beamy, well-ballasted fin-keel form with an unusually generous sail plan, and the balsa-cored deck is a genuine cold-weather comfort feature rather than a gimmick. The trade-off is a small fuel and water envelope and a cored deck that punishes careless modification. For a sailor who values stiff handling and a warm cabin over long-range self-sufficiency, it remains a credible used-market choice.
Pros
- Balsa-cored deck insulates against cold water and reduces cabin condensation
- Lead fin keel with 43 percent ballast ratio for a stiff, predictable hull
- Significantly overrigged for its class, with multiple fractional rig options
Cons
- Balsa deck core requires disciplined sealing around any penetration
- Only 60 liters of fresh water and 30 liters of steel-tank fuel capacity
- Modest 8 hp power option yields just 6.0 knots under engine
