Hull Form and Design Philosophy
The 28.5 was built predominantly of fiberglass with wood trim throughout, a combination that defined American production sailboats of its era. The hull carries a raked stem and reverse transom, a stylistic flourish that gave the boat a purposeful silhouette and made it immediately recognizable on the dock. At 10 feet 6 inches of beam on just under 29 feet of length, the hull is notably wide — the length-to-beam ratio of 2.71 places it in the top 14% of all similar sailboat designs for interior volume. That beam was a deliberate Hunter trademark of the period, trading some upwind pointing ability for a generous cabin and stable platform. The displacement-to-length ratio of 233 puts the boat squarely in moderate-displacement territory, which in practice means it tracks reasonably well through a chop without the hobby-horsing that plagues ultra-light designs.
The B&R Rig: Clever Engineering, Different Habits
The feature that most distinguishes the 28.5 from other boats of its size and era is the B&R rigging system developed by Lars Bergstrom and Sven Ridder. The split backstay and swept-back spreaders define the rig from a distance: the B&R system uses swept-back spreaders to tension the mast, and the split backstay is tucked well to the sides of the transom, freeing the mainsail to be eased dramatically without fouling a conventional center-mounted backstay. For coastal family sailing this arrangement is genuinely user-friendly — there are no backstay adjusters to manage on a single centerline wire, no running backstays to cross on a tack, and the rig reacts predictably. The 28.5 carries a masthead sloop configuration rather than the fractional rig its successor the Hunter 28 would adopt, which means it can carry a larger headsail and harvest more power in light air — a trade-off the successor boat gave up in exchange for easier single-handed handling. The total sail area of 397 square feet drives a boat of 7,000 pounds displacement, producing a sail-area-to-displacement ratio of 17.5, a figure that suggests the boat is capable of reaching its theoretical hull speed in moderate breeze without difficulty. In statistical comparison with similar designs, the 28.5 carries more rig than 66% of boats in its class, which bears watching in fresh conditions.
Accommodations and Interior Layout
Hunter's wide-beam philosophy paid direct dividends below decks. The factory standard package included a teak and holly cabin sole, a dinette table, a navigation table, a stainless steel sink, hot and cold pressurized water, a two-burner stove, and an icebox — a specification list that would have impressed buyers accustomed to stripping-down base models and pricing every option. The freshwater tank holds 27 US gallons, a respectable reserve for a boat this size, and the fuel tank carries 11.5 US gallons for the inboard diesel. The aft berth arrangement runs fore-and-aft, a distinction worth noting because the successor Hunter 28 switched to an athwartships aft double berth — a change that affected how gear could be stowed and how the berth functioned at sea. The 28.5's fore-and-aft aft berth is arguably more comfortable underway when the boat is heeled. A spinnaker was available as a factory option, and self-tailing two-speed jib sheet winches were part of the standard fit, which was not universal on competitive boats of the period.
Stability and Coastal Capability
The ballast picture is straightforward: 3,000 pounds of ballast in a 7,000-pound displacement boat yields a ballast ratio of approximately 43%, higher than 66% of similar sailboat designs, which translates to a boat that stands up to its sails firmly and recovers briskly from heeling. The capsize screening formula of 2.2, however, sits above the commonly cited threshold of 2.0, a figure that places the 28.5 in the category of coastal rather than offshore passagemakers. This is not surprising given Hunter's intended market — the boat was built for families sailing sheltered and semi-exposed coastal waters, not for blue-water voyages. The comfort ratio of 18.8 reflects the trade-offs inherent in a wide, relatively light hull: motion in a seaway will be lively, and sailors prone to discomfort in confused chop may feel it. Within its design envelope of protected bays and coastal day-hops, the stability picture is favorable.
Known Issues and Ownership Considerations
The 28.5 is a production fiberglass boat of the mid-1980s, which carries with it a predictable set of maintenance considerations. Osmotic blistering in the gelcoat was a common issue for GRP hulls of this vintage that were kept in saltwater for extended periods without regular barrier coating. The B&R rig, while elegant in concept, requires specific knowledge to tension correctly — the swept-back spreaders rely on fore-and-aft compression rather than staying wires to resist mast pumping, and owners unfamiliar with the system sometimes overtighten or leave the rig poorly tuned. The internally-mounted spade rudder provides responsive steering but demands periodic inspection of the bearings and pintles, as internal rudder stocks can conceal corrosion until it becomes structural. The wing keel option, which draws only 4 feet, is attractive for shallow waters but the wider planform of the keel makes it more susceptible to grounding damage and requires more careful haulout coordination to keep the keel supported properly.
Refit Priorities
Boats from the 1985–1988 production run are now well into middle age, and buyers should plan their refit priorities accordingly. Standing rigging replacement is the most pressing safety item on any example that has not been re-rigged within the past decade — the B&R's swept spreader geometry places shear loads on the chainplates and shroud terminals that differ from conventional rigs, and stainless fatigue can be invisible to the eye. Running rigging for a boat this size is straightforward to price out and should be treated as consumable. The diesel inboard, whatever its make, benefits from a full mechanical survey including injector condition, raw-water pump impeller history, and stuffing box or shaft seal inspection. The teak and holly cabin sole is a factory original and typically shows its age through the varnish — restoration is labor-intensive but the underlying wood is usually sound unless water intrusion has been neglected. An anti-fouling barrier coat on any hull that is persistently kept in the water addresses the osmotic risk definitively.
The Verdict
The Hunter 28.5 is a boat that understood its customers well. Hunter Marine gave the family coastal-cruising market a wide, stable, well-equipped platform with a genuinely distinctive rig and enough interior volume to make weekend living aboard comfortable. The B&R system rewards sailors who take the time to understand it, and the optional shoal-draft wing keel opens up anchorages that fin-keel competitors cannot reach. It is not a bluewater boat, and its motion in a seaway will not suit everyone, but within its design envelope it remains a capable and characterful choice from a production era that valued livability highly.
Pros
- Wide beam delivers genuine interior volume rare at this length
- High ballast ratio provides firm initial stability for coastal conditions
- B&R rig with split backstay frees mainsail travel and simplifies sail-handling
- Masthead configuration captures light-air performance that fractional rigs sacrifice
- Factory standard equipment was unusually comprehensive for the period
- Shoal-draft wing keel option opens shallower cruising grounds
Cons
- Capsize screening formula above 2.0 limits suitability for offshore passages
- B&R rig requires specific knowledge to tune correctly; unfamiliar owners often leave it poorly set
- Wide beam reduces upwind pointing ability relative to narrower competitors
- Mid-1980s GRP construction carries osmotic blister risk in long-term saltwater immersion
- Comfort ratio reflects lively motion in confused chop
- Short production run (1985–1988) limits parts and community knowledge compared to longer-lived models
