Design and Construction
Jackett's Piper carries a length-to-beam ratio of 2.60 and a displacement-to-length figure of 213, which places it among what the design data call "moderate racers" rather than heavy-displacement cruisers. The 36 percent ballast ratio, on lead in a fin with bulb, is higher than only about a quarter of comparable designs, yet the boat's beam-driven plan gives it extraordinary interior and cockpit width for the length: it is roomier than 92 percent of all similar sailboat designs. The hull is solid fiberglass with a solid fiberglass deck, and the keel is lead. At 6,300 pounds displacement with 2,300 pounds of ballast, the Piper draws between 3.90 and 4.20 feet depending on load, letting it tuck into shallow marinas that defeat deeper fin-keel contemporaries. The wetted surface runs about 258 square feet, and the immersion rate is roughly 895 pounds per inch, so the boat settles predictably under cruising stores.
Rig and Handling
The Piper is a masthead sloop carrying 385 square feet of mainsail and jib area on the reference sail plan. The sail-area-to-displacement ratio is 18.1 with the standard rig and rises to 21.5 with a 135 percent genoa, a figure that 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, which helps the light-air numbers but demands disciplined trim. Halyard and sheet specifications are generous for the size: all three halyards (main, jib/genoa, spinnaker) run 81.8 feet at 5/16 inch, while jib and genoa sheets are 28.2 feet at 3/8 inch and the mainsheet is 70.6 feet at 3/8 inch, giving ample lead length for winch and traveler geometry. The theoretical displacement-hull speed is 6.5 knots with a calculated max near 6.1.
Accommodations and Tankage
Below, the Piper's beam translates into liveaboard-friendly volume rather than spare racing minimalism. Fresh water capacity is 30 US gallons, and the fuel tank holds 16 US gallons of diesel, feeding the optional inboard Volvo Penta diesel rated at 18 horsepower. Those figures support weekend and short-coastal cruising without the constant conservation mindset of smaller-dayboat designs. The Motion Comfort Ratio is 16.1, more comfortable than only 18 percent of similar designs — a reminder that the roomy, light-displacement hull trades some sea-kindliness for the space and turn of speed Jackett prioritized.
Performance Envelope and Limits
The capsize screening value is 2.35, a number that 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. The SA/D and L/B advantages are real for sheltered-water sailing, but the comfort and capsize metrics argue for owner expectations centered on 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, while the modest comfort and capsize numbers keep it honestly in the day-and-weekend cruiser lane.
Pros
- Roomier than 92 percent of similar designs by length-to-beam proportion
- Shallow draft (3.90–4.20 ft) eases marina and gunkhole access
- Light-wind speed advantage via high SA/D with genoa
- Lead fin-and-bulb keel with 36 percent ballast ratio
Cons
- Capsize screening of 2.35 excludes ocean-race acceptance
- Motion Comfort Ratio better than only 18 percent of peers
- Significantly overrigged for size, demanding attentive sail trim
