Design and Construction
The hull is fiberglass built with BALTEK ContourKore end-grained balsa composite construction using biaxial and unidirectional glass with vinylester resin on the outer hull. J/Boats formed the structure with a “SCRIMP” resin infusion system molding process for strength, and GRP-molded structural bulkheads are bonded to the hull and deck. The keel carries 3,900 pounds of lead ballast, cast and bolted to a deep molded stub, while a high-aspect spade rudder gives the helm its bite. At 35.25 feet overall with an 11.5-foot beam and a 30.5-foot waterline, the J/109 is 3,200 pounds heavier than the J/105s she descended from in spirit, a weight penalty that buys cruising substance without killing the turn of speed.
Rig and Handling
Her sailplan includes a main and a non-overlapping headsail on a furling system, a combination that keeps short-handed work manageable and avoids the winch strain of overlapping genoas. Continuous rod rigging holds up the tapered aluminum mast, and a hydraulic backstay adjuster makes it possible to heed the captain's command for more mast bend when the breeze builds. All the winches are self-tailing. For offwind work, an asymmetrical spinnaker flies from an extendable bowsprit that retracts into the forward V-berth when not in use, keeping the forecabin clear. The standard draft is seven feet, though a shallow-keel option with 5.75 feet of vertical reach was built for some hulls. With a hull speed of 7.4 knots, she is a frisky performer on her fin-with-bulb-and-spade-rudder platform.
Accommodations
Practical Sailor's survey notes there are two cabins, and the forward V-berth does double duty as stowage for the retracted bowsprit. The fuel tank — a modest 18.5 gallons — sits under the aft cabin berth, a placement that keeps it out of the saloon but limits cruising range on the factory 27-horsepower Yanmar 3GM30 diesel with sail drive and folding prop. Water capacity from new was 21 gallons, and the original house battery bank was only 80 amp hours on a 12-volt system, both lean for extended off-grid cruising.
Known Issues
Factory fuel, water, and battery figures are smaller than most cruisers would want today: 18.5-gallon fuel, 21-gallon water, and 80 amp-hour house bank. The shallow-keel variant's 5.75-foot depth is a choice to verify on any specific boat, since the deeper seven-foot fin is the standard.
Refits and Ownership
Owners shopping a J/109 should plan from the outset for larger fuel and water tankage if they intend to cruise, and a heavier house battery bank than the original 80 amp hours. The Yanmar 3GM30 with sail drive is a straightforward auxiliary to service, but the small standard tanks argue for a refit-minded survey.
The Verdict
The J/109 is a genuine dual-purpose 35-footer: quick enough to campaign yet stable and laid out for weekends aboard. Her infusion-molded balsa construction and bonded bulkheads are serious structure, and the retractable-spinnaker bowsprit is a clever cruiser-friendly touch. The weak spots are purely provisioning — factory fuel, water, and battery figures assume you race more than you roam.
Pros
- True racer/cruiser balance from Rod Johnstone's design
- Balsa-composite SCRIMP hull with bonded structural bulkheads
- Non-overlapping furling headsail and self-tailing winches ease handling
- Retractable bowsprit keeps asymmetrical spinnaker work clean
Cons
- Factory fuel (18.5 gal), water (21 gal), and battery (80 Ah) are lean for cruising
- Shallow-keel version (5.75 ft) must be confirmed against the 7-ft standard
