Danboat 28 Information, Review, Specs

Make
Danboat
Model
28
Builder
Danboat
Designer
K. Tholstrup-Hansen
Number Built
Production Year(s)
1963 - ??

The Danboat 28 is a quintessential example of the "Golden Age" of fiberglass yacht design, emerging from the renowned Danboat I/S shipyard in Ærø, Denmark, during the late 1960s and early 1970s. Designed by the legendary firm Sparkman & Stephens as Design No. 1827, the vessel reflects the era’s transition from timber to GRP while maintaining the heavy-displacement, long-keel characteristics that defined offshore seaworthiness at the time. Unlike many of its lighter, mass-produced contemporaries, the Danboat 28 was built to a high Scandinavian standard, intended to handle the rigorous conditions of the Baltic and North Seas. It shares a clear lineage with other S&S designs of the period, such as the She 31 and the North Star 500, though it maintains a uniquely Danish identity through its joinery and hull finish.

Sailing Performance & Handling

Under sail, the Danboat 28 is defined by its stability and predictable motion. With a displacement of approximately 7,500 lbs and a ballast ratio frequently exceeding 40%, the boat is notably stiff, allowing it to carry full sail longer than modern light-displacement cruisers. According to historical design notes from the Sparkman & Stephens archives, the hull features a traditional long keel with a cutaway forefoot and a transom-hung rudder, a configuration that provides exceptional directional stability.

While the Danboat 28 is not a "light-air flyer"—its high wetted surface area can make it sluggish in breezes under 8 knots—it excels as the wind increases. It tracks with minimal helm pressure and carves through a chop without the pounding associated with flatter-bottomed designs. Owners often report that the boat feels significantly larger than its 28-foot length when venturing into open water, a sentiment echoed in classic boat reviews by Danish publication Bådmagasinet, which has historically praised the model for its "sea-kindly" behavior.

Interior Comfort & Variations

The interior of the Danboat 28 is a masterclass in traditional Danish cabinetmaking, typically finished in rich mahogany or teak. The layout is standard for a cruiser of this vintage: a forward V-berth, a marine head situated between the mast bulkhead and the main salon, and two longitudinal settees that double as sea berths. The galley is generally located aft, flanking the companionway to maximize ventilation and allow the cook to remain in contact with the cockpit.

While the beam is relatively narrow by modern standards (approximately 8 feet, 2 inches), the headroom is surprisingly generous for a 28-footer of this era, usually hovering around 5 feet, 10 inches. The shipyard also produced a larger sibling, the Danboat 33, which utilized a similar aesthetic and hull philosophy but offered an aft-cabin configuration. A smaller sibling, the Danboat 26, was also available for those seeking a more manageable daysailer with similar lines, though it lacked the full standing headroom of the 28.

Known Issues & Buyer’s Checklist

Prospective buyers should approach a Danboat 28 with an eye toward the specific maintenance needs of a vintage fiberglass yacht.

  • Osmotic Blistering: Like many hulls from the late 60s, the Danboat 28 can be prone to osmosis. A professional moisture meter reading of the hull below the waterline is essential during a pre-purchase survey.
  • Original Power Plants: Many units were originally fitted with Volvo Penta MD7A or MD11C diesel engines. These are "raw-water cooled" engines, and after five decades, internal corrosion and parts availability are significant concerns. Check for evidence of a modern repower (e.g., Beta Marine or Yanmar).
  • Chainplates and Deck Leaks: The stainless steel chainplates are bolted through the hull/deck joint. Over time, the sealant can fail, leading to moisture ingress into the plywood core of the deck. Inspect the interior cabinetry around the chainplates for water staining or soft spots.
  • Rudder Bushings: The transom-hung rudder is robust, but the pintles and gudgeons can develop play over decades of use. Check for "clunking" or excessive vibration when the helm is moved under load.

Community & Resources

The Danboat 28 enjoys a dedicated following in Northern Europe. The most prominent technical resource is the Danish "Danboat Owners Group," which facilitates the sharing of original brochures and refit advice. While there is no centralized international association, technical data and original S&S blueprints are often curated by the Sparkman & Stephens Association, which tracks the history and preservation of the firm's designs globally.

The Verdict

The Danboat 28 is a "sailor’s sailboat," prioritizing offshore integrity and classic aesthetics over interior volume and marina-bound amenities. It is an ideal choice for a solo sailor or a couple looking for a capable coastal cruiser with a blue-chip design pedigree.

Pros:

  • Exceptional seaworthiness and tracking due to the S&S-designed long keel.
  • High-quality Danish construction and interior joinery.
  • Timeless, elegant lines that stand out in a sea of modern "caravan" style yachts.

Cons:

  • Limited interior volume and "open plan" feel compared to modern 28-footers.
  • Slower performance in light wind conditions.
  • Maintenance requirements associated with a 50-year-old fiberglass hull and potential original machinery.

Measurements

Construction & Hull

Construction Material
Fiberglass
Hull Type
Monohull Sailboat
Keel Type
Full
Rudder
1x Attached
Ballast
2866 lbs (Iron)
Displacement
7937 lbs
Water Capacity
-
Fuel Capacity
-

Dimensions

Length Overall (LOA)
28.05 ft
Waterline Length (LWL)
21 ft
Beam
8.27 ft
Draft
4.27 ft
Max Headroom
-
Air Draft
-
Hover over a measurement
IJPE FS LOALWL

Rig & Sails

Rig Type
Masthead Sloop
P (Main Luff)
-
E (Main Foot)
-
I (Foretriangle Height)
-
J (Foretriangle Base)
-
Forestay Length (est)
-
Sail Area
258 sqft

Calculations

Sail Area / Displacement (SA/D) Ratio
10.37
Ballast / Displacement Ratio
36.11
Displacement / Length Ratio (D/L) Ratio
382.6
Comfort Ratio
31.81
Capsize Screening Formula
1.66
Hull Speed
6.14 kn