Design and Construction
The J/28's hull is fiberglass, a material choice that keeps in-season maintenance to a minimum for the owner anchor. Rod Johnstone gave the boat a length-to-beam ratio of 2.84, a figure that places it among the beamier designs of its size class — the yachtdatabase review notes the designer chose a significantly more roomy hull form, and that the J/28 is roomier below than 76 percent of comparable sailboats on that measure. With a fin keel and spade rudder, the underbody is built for agility rather than straight-line tracking; the fin keel delivers splendid maneuverability but surrenders some directional stability to a longer keel. The lead ballast of 3,000 pounds sits at a 38 percent ballast ratio, which the same review places above 38 percent of similar designs — yet that ratio is just below average, indicating an ability to resist heeling that is itself below average for the type.
Rig and Handling
The boat carries a fractional sloop rig and, by the review's accounting, more sail area relative to its size than 73 percent of similar sailboats, leaving it slightly overrigged for the class. The wetted surface runs about 269 square feet, and the theoretical displacement-hull speed works out to 6.6 knots. Draft is load-dependent, ranging from roughly 5.0 to 5.3 feet, which keeps the boat within reach of most marina approaches. The standing and running rigging dimensions are well documented: the mainsail, jib/genoa, and spinnaker halyards each run 94.2 feet at 5/16 inch diameter, while the jib and genoa sheets are 28.4 feet of 3/8 inch line, the mainsheet 71 feet of 3/8 inch, and the spinnaker sheets 62.5 feet of 3/8 inch. Smaller control lines — cunningham, kicking strap, and clew outhaul — are each 26 feet or less of 5/16 inch. The immersion rate of 837 pounds per inch gives a clear sense of how load affects both draft and waterline.
Accommodations
The beamy hull that Johnstone drew pays dividends in interior volume even if the sources stop short of detailing the layout. At 10 feet of beam on a 28.5-foot overall length, the J/28 uses its 2.84 length-to-beam ratio to give livable space that few similarly sized designs match. The 35-gallon water and 20-gallon fuel capacities support short coastal cruising without frequent replenishment, and the 18-horsepower Yanmar diesel provides auxiliary propulsion appropriate to the 7,900-pound displacement.
The Verdict
The J/28 is a concentrated expression of Johnstone's mid-1980s design thinking: a small, beamy, slightly overrigged fractional sloop that trades absolute stiffness and directional stability for maneuverability and room. It is a fiberglass boat with documented rigging specs and a hull form that punches above its length in accommodations, built in modest numbers over a brief production window.
Pros
- Beamy hull delivers interior space exceeding 76 percent of comparable designs
- Fin keel gives excellent maneuverability in close quarters
- Fiberglass construction minimizes in-season maintenance
- Well-documented rigging dimensions simplify replacement and upgrades
Cons
- Below-average resistance to heeling for the class
- Fin keel sacrifices directional stability relative to a long keel
- Slightly overrigged, which can tax a short-handed crew
