With a lead-ballasted fin-and-bulb keel, masthead rig, and modest diesel, the Piper is best understood as a coastal cruiser with a distinctly modern hull-form bias for its size.
Design and Construction
The Piper has a length-to-beam ratio of 2.60 and a displacement-to-length figure of 213. Those numbers place it among what the design data call “moderate racers,” rather than heavy-displacement cruisers.
Its beam-driven plan gives the boat extraordinary interior and cockpit width for its length: the Piper is roomier than 92 percent of all similar sailboat designs. The hull and deck are solid fiberglass, and the keel is lead. The fin-and-bulb keel carries a 36 percent ballast ratio, higher than only about a quarter of comparable designs.
The Piper displaces 6,300 pounds and carries 2,300 pounds of ballast. Depending on load, it draws between 3.90 and 4.20 feet, allowing it to tuck into shallow marinas that defeat deeper fin-keel contemporaries. Wetted surface is about 258 square feet, while the immersion rate is roughly 895 pounds per inch, so the boat settles predictably under cruising stores.
Rig, Performance, and Handling
The Piper is a masthead sloop carrying 385 square feet of mainsail and jib area on the reference sail plan. Its sail-area-to-displacement ratio is 18.1 with the standard rig and rises to 21.5 with a 135 percent genoa. That figure reportedly makes it quicker than 76 percent of similar boats in light wind.
The rig carries more sail plan than 100 percent of similar sailboats in the dataset. That helps its light-air performance but calls for disciplined trim. Theoretical displacement-hull speed is 6.5 knots, with a calculated maximum near 6.1.
Halyard and sheet specifications are generous for a boat of this size. All three halyards—main, jib/genoa, and spinnaker—are 81.8 feet long and 5/16 inch in diameter. Jib and genoa sheets are 28.2 feet at 3/8 inch, while the mainsheet is 70.6 feet at 3/8 inch. These lengths provide ample lead for the winch and traveler geometry.
Accommodations, Tankage, and Engine
Below, the Piper’s beam provides liveaboard-friendly volume rather than the spare minimalism of a racing interior. Fresh-water capacity is 30 US gallons, and the fuel tank holds 16 US gallons of diesel. The optional inboard Volvo Penta diesel is rated at 18 horsepower.
Those capacities support weekend and short-coastal cruising without the constant conservation mindset associated with smaller dayboats.
Comfort and Cruising Limits
The Piper’s Motion Comfort Ratio is 16.1, making it more comfortable than only 18 percent of similar designs. It’s a reminder that the roomy, light-displacement hull trades some sea-kindliness for the space and turn of speed Jackett prioritized.
Its capsize screening value is 2.35, which would bar the boat from ocean-race acceptance under that standard. The Piper is a coastal and moderate-condition boat rather than a bluewater racer. Its sail-area-to-displacement and length-to-beam advantages are useful in sheltered waters, but the comfort and capsize figures point toward bay and nearshore use.
The Verdict
The Tartan 28 Piper is a Jackett-designed coastal sloop that trades offshore severity for beam-driven volume and a light-air sail plan. Its overrigged masthead configuration and shallow-loading draft make it a forgiving, quick performer in protected waters. Its modest comfort and capsize figures, however, keep it firmly in the day-and-weekend cruiser category.
Pros
- Roomier than 92 percent of similar designs by length-to-beam proportion
- Shallow draft of 3.90–4.20 ft eases access to marinas and gunkholes
- High SA/D with a genoa provides a light-wind speed advantage
- Lead fin-and-bulb keel with a 36 percent ballast ratio
Cons
- Capsize screening value of 2.35 excludes ocean-race acceptance
- Motion Comfort Ratio is better than only 18 percent of comparable boats
- Significantly overrigged for its size, requiring attentive sail trim
