Triss Magnum Information, Review, Specs

Sailing Performance & Handling

The sailing characteristics of the Triss Magnum are defined by its high ballast ratio and relatively conservative sail plan. With a displacement of approximately 1,200 kg and nearly half of that weight (approx. 600 kg) concentrated in the keel, the boat is remarkably stiff for a 20-foot vessel. This high stability makes it an ideal platform for novice sailors or those frequently sailing in gusty coastal waters. According to historical technical summaries from the Swedish Maritime Museum (Sjöhistoriska museet), Brohäll designed the hull with a moderate draft and a generous beam to ensure it would remain upright even when pressed.

Under sail, the Magnum is not a greyhound; its hull speed is limited by a short waterline, and its relatively heavy displacement for its length means it requires a decent breeze to truly come alive. However, it tracks well thanks to a well-proportioned skeg-hung rudder, which provides a level of helm feedback and directional stability rarely found in modern light-displacement trailer-sailers. Owners often note that while it lacks the pointing ability of its sleeker sibling, the Peter Norlin-designed Triss Norlin, the Magnum offers a far more "ship-like" feel in a seaway, cutting through chop rather than bouncing over it.

Interior Comfort & Variations

For a vessel measuring just 6 meters (approx. 19.7 feet), the Triss Magnum offers a surprisingly functional interior, largely due to its "raised deck" or "flush deck" style construction which maximizes internal volume. The cabin typically features a traditional four-berth layout: a V-berth in the bow and two longitudinal settees in the main cabin. While headroom is limited—making it a "sitting-room only" cabin—the arrangement is sufficient for weekend coastal hops.

The materials used by ABC Fabrikerna were utilitarian, featuring molded GRP liners and basic teak or mahogany trim. Variations in the model were minor throughout its production run, though later versions often featured improved window seals and updated interior upholstery. Unlike the Triss 570 or the racing-oriented Triss Norlin, the Magnum was marketed specifically as the "luxury" cruiser of the Triss family, often coming equipped with a small galley slide-out or a dedicated space for a chemical toilet—luxuries that were ambitious for a boat of this footprint in 1970.

Known Issues & Buyer’s Checklist

Prospective buyers of a Triss Magnum should focus on the structural integrity of a 50-year-old GRP hull. While ABC Fabrikerna built these boats to be "over-engineered," certain age-related issues are common:

• Deck Core Delamination: The deck is a sandwich construction. Spongy areas, particularly around the mast step or the chainplates, indicate moisture ingress into the balsa or foam core, a common result of failing sealant on deck hardware.
• Rudder Bushing Wear: The skeg-hung rudder is a robust design, but the bushings can wear over decades, leading to a "clunking" sensation in the helm. This should be checked while the boat is out of the water.
• Chainplate Reinforcement: On some early models, the chainplates (where the shrouds attach to the hull) were noted to have minimal backing plates. Inspection for stress cracks in the fiberglass in these high-load areas is essential.
• Window Leaks: The original rubber-gasket windows are a frequent source of leaks. Many owners have since replaced these with bolted-through acrylic panels, which is a desirable upgrade.
• Original Inboards: While many Magnums use outboards, some were fitted with the Volvo Penta MD1 or small Vire engines. Parts for these vintage powerplants are becoming increasingly scarce.

Community & Resources

The Triss Magnum enjoys a dedicated following within the Swedish classic boat community. The most prominent resource for technical data and historical context is the Sjöhistoriska Museet, which maintains records on the works of Per Brohäll and the industrial history of ABC Fabrikerna. While no singular international "Magnum Class Association" exists today, the boat is a frequent subject of technical discussion on Swedish maritime heritage forums, where enthusiasts document restoration projects and sail replacements.

The Verdict

The Triss Magnum is a quintessential "first cruiser" that offers an outsized sense of security and traditional sailing values in a compact, affordable package.

Pros

• Exceptional Stability: The high ballast-to-displacement ratio makes it safer and more forgiving than most boats in the 20-foot class.
• Brohäll Pedigree: Benefits from the design DNA of the Albin Vega, ensuring seaworthiness and logical deck layouts.
• Affordability: Low entry price and simple systems make it an excellent choice for budget-conscious sailors or DIY restorers.

Cons

• Limited Performance: Not built for racing; sluggish in light winds compared to more modern or sport-tuned designs.
• Cramped Headroom: The interior, while well-laid out, is better suited for overnighting than extended cruising for adults.
• Aging Systems: Buyers must be prepared to address decades of wear on deck seals and original hardware.