This moderate-displacement, fin-keeled monohull has a lead-ballast ratio near 43 percent. Its length-to-beam ratio of 4.04 indicates a reasonably beamy hull for its length.
Design and Construction
The hull and deck are both hand-laid fiberglass, but only the deck uses a balsa-cored sandwich construction. That core does more than save weight: the builder used it to insulate the cabin against cold water and reduce condensation when the sea is colder than the air below.
The balsa core does require care. Any through-deck modification must be properly sealed, since water ingress can lead to core rot. Deck fittings, winch bolts, and other through-deck hardware are all potential entry points.
The H-35 has a lead fin keel and draws between 4.92 and 5.22 feet, depending on load. Displacement is 7,716 pounds, including 3,351 pounds of ballast. Its displacement-length ratio of 184 places it in the moderate-racer range.
Rig and Handling
The H-35 was offered with more than one fractional sloop rig. The standard rig carries 390.7 square feet of mainsail and jib, while an alternative fractional rig reduces that area to 355.2 square feet.
The sail-area-to-displacement ratio is 16.0 using the ISO reference sail and rises to 18.8 with a 135 percent genoa. The design is noted as carrying more rig than 82 percent of comparable sailboats, making it significantly overcanvased for its size.
Theoretical hull speed is 6.9 knots. A motion comfort ratio of 23.6, an immersion rate of about 790 pounds per inch, and wetted surface near 269 square feet complete the picture of a stiff, moderate-volume hull. Its capsize screening value is 1.73. By modern metrics, the hull is a steady coastal performer rather than an offshore survivor.
Accommodations
Below, the H-35 sleeps five in a teak interior and includes a galley and toilet. Fresh-water capacity is limited to 60 liters—a modest amount for the number of berths and a real constraint during extended stays at anchor without replenishment.
The insulated deck should make the cabin more tolerable when cruising in cold water than a solid-laminate deck would, while also helping to reduce condensation.
Engine, Fuel, and Range
Engine installations varied by hull, but the options centered on Yanmar diesels: either a YS8M inboard or an 8-horsepower Yanmar unit, both driving a shaft. With the 8-horsepower Yanmar, the boat makes 6.0 knots.
The steel fuel tank holds 30 liters. That small reserve is better suited to day sailing and short hops than to long passages under power.
Known Issues
The principal structural caveat is the balsa-cored deck. Because balsa forms the sandwich core, any penetration through the deck structure must be carefully sealed to keep water out of the core. Careless installation or modification of deck hardware can invite rot.
The Verdict
The H-35 is a thoughtfully engineered Scandinavian cruiser-racer. Groop’s hull combines a beamy, well-ballasted fin-keel form with an unusually generous sail plan. Its balsa-cored deck is a genuine cold-weather comfort feature rather than a gimmick.
The trade-offs are limited fuel and water capacity, modest auxiliary power, and a cored deck that punishes careless modification. For a sailor who values stiff handling and a warmer cabin over long-range self-sufficiency, the H-35 remains a credible used-market choice.
Pros
- Balsa-cored deck insulates against cold water and reduces cabin condensation
- Lead fin keel and a ballast ratio near 43 percent contribute to a stiff, predictable hull
- Significantly overrigged for its class, with multiple fractional-rig options
Cons
- Balsa deck core requires disciplined sealing around every penetration
- Fresh water is limited to 60 liters, while the steel fuel tank holds only 30 liters
- The modest 8 hp engine option yields just 6.0 knots under power
