Tes 28 Magnam Information, Review, Specs

Make
Tes
Model
28 Magnam
Builder
Tes Sailboats
Designer
Tomasz Siwik
Number Built
Production Year(s)
2010 - ??

The Tes 28 Magnam represents the pinnacle of Tomasz Siwik’s design philosophy, blending the trailerable versatility of Polish lake cruisers with the robust seaworthiness required for offshore passages. Launched in 2010 as a successor to the popular Tes 678 and 720 models, the 28 Magnam was engineered to maximize internal volume without sacrificing the "fast cruising" DNA that Tes Yacht has cultivated since 1980. Built by the Jacht Plast shipyard in Okuniew, Poland, the vessel is distinctive for its high freeboard, elegant hull lines, and a plumb bow that extends the waterline to improve hull speed. While many 28-footers are confined to coastal jaunts, the Magnam is frequently CE-rated for Category B (Offshore), a testament to its structural integrity and stability.

Sailing Performance & Handling

Under sail, the Tes 28 Magnam is characterized by its high initial stability, a direct result of its nearly 3-meter beam and a thoughtfully distributed ballast system. According to technical specifications from Tes Yacht Canada, the boat is typically offered with a swing keel (centerboard) or a fixed keel, with the former being highly prized for its ability to navigate shallow inland waters or be beached.

The sailing experience is tailored toward short-handed cruising. The fractional sloop rig features a self-tacking jib option and all lines lead aft to the cockpit, allowing a single sailor to manage the vessel with ease. Despite its significant windage—a byproduct of the generous interior headroom—the hull’s sharp entry and Siwik's hydrodynamic refinements allow it to point surprisingly well. Handling is reported to be predictable; the boat tracks well due to a deep spade rudder, though the high freeboard requires a proactive approach when docking in heavy crosswinds. For those transitioning from smaller dinghies, the Magnam feels substantial and "ship-like," absorbing chop with a motion more akin to a 32-foot vessel.

Interior Comfort & Variations

The "Magnam" moniker is most evident below deck, where the interior volume rivals many 30-to-32-foot competitors. Tomasz Siwik’s background in designing for the demanding charter market shines through in the ergonomic layout. The cabin typically features a full standing headroom of approximately 1.87 meters, a rare luxury in a 28-foot hull.

The standard configuration offers an open-plan salon that emphasizes light and air, often finished in mahogany or light oak. The galley is remarkably well-equipped for a pocket cruiser, featuring a two-burner stove, a refrigerator, and ample storage for extended stays. Variations of the 28 Magnam include a two-cabin layout with a private bow cabin and an aft double berth tucked under the cockpit. The enclosed head is a full-sized compartment, often including a shower facility. Unlike its smaller sibling, the Tes 246 Versus, the 28 Magnam utilizes its extra length to provide a dedicated navigation station and a larger dinette that can comfortably seat six adults.

Known Issues & Buyer’s Checklist

Prospective buyers should focus their inspections on the specific mechanical systems that enable the boat’s versatility. Because many Tes 28s are equipped with a mast-lowering system (A-frame), the forestay attachment points and the mast step should be checked for stress fractures or hardware fatigue.

  1. Swing Keel Mechanism: On centerboard models, inspect the lifting cable and the pivot pin for wear or corrosion. A "thumping" sound while underway may indicate worn bushings in the centerboard trunk.
  2. Window Sealing: The large, stylish panoramic windows are a signature of the Magnam's profile. Over time, the sealant may degrade; check the interior woodwork below the ports for signs of water ingress or staining.
  3. Deck Hardware Bedding: Early production units may require re-bedding of stanchions and cleats, as the high-load areas on these "fast cruisers" can develop minor leaks if the boat has been raced or pushed hard in heavy seas.
  4. Engine Access: While the inboard Yanmar or Nanni engines are reliable, the engine box is compact. Ensure the soundproofing is intact and check the shaft seal (if not a saildrive) for easy access and maintenance.

Community & Resources

The Tes Yacht community is most active in Central and Northern Europe, with a growing presence in North America. Owners often congregate through the official manufacturer’s channels and regional associations like the Polish Yachting Association. While there isn't a singular English-language "Magnam Club," the shared design lineage with the Tes 678 and 246 Versus means that technical advice is often found within broader Tes Yacht owner groups and technical wikis dedicated to Polish-built cruisers.

The Verdict

The Tes 28 Magnam is an exceptional choice for the cruising family who refuses to choose between the convenience of a trailerable boat and the comfort of a larger yacht. It stands as a pinnacle of the "volume-per-foot" category.

Pros:

  • Exceptional interior volume and headroom for its class.
  • Category B rating available for offshore confidence.
  • Highly versatile keel and mast-lowering options for inland exploration.
  • Quality woodwork and a robust, hand-laid fiberglass hull.

Cons:

  • High freeboard creates significant windage during low-speed maneuvers.
  • The cockpit can feel slightly cramped when sailing with more than four adults.
  • Limited availability on the used market outside of Europe.

Measurements

Construction & Hull

Construction Material
Fiberglass
Hull Type
Monohull Sailboat
Keel Type
Wing
Rudder
1x —
Ballast
1980 lbs
Displacement
6400 lbs
Water Capacity
16 gal
Fuel Capacity
-

Dimensions

Length Overall (LOA)
28 ft
Waterline Length (LWL)
26 ft
Beam
9.92 ft
Draft
4.58 ft
Max Headroom
-
Air Draft
-
Hover over a measurement
IJPE FS LOALWL

Rig & Sails

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

Calculations

Sail Area / Displacement (SA/D) Ratio
17.64
Ballast / Displacement Ratio
30.94
Displacement / Length Ratio (D/L) Ratio
162.56
Comfort Ratio
17.5
Capsize Screening Formula
2.14
Hull Speed
6.83 kn