Design and Construction
The LM 81 measures 26.57 feet overall, with a 22.31-foot waterline, a 9.51-foot beam, and a 4.43-foot draft. She displaces 7,496 pounds and carries 3,086 pounds of iron ballast—41.17 percent of her displacement.
Andersen specified solid, hand-laid fiberglass construction, a fin keel, and a spade rudder. Her ballast is encapsulated. A displacement-to-length ratio of 301.36 identifies her as a heavy sailboat, while a comfort ratio of 24.45 and a capsize ratio of 1.95 describe a hull that is very stable and stiff, with good righting capability if capsized. Those proportions, together with a sail-area-to-displacement ratio of 11.78, make the LM 81 better suited to coastal cruising than offshore passagemaking, according to SailboatLab’s data sheet.
Rig, Engine, and Handling
The LM 81 carries a masthead sloop rig with 281 square feet of total sail area. That area is divided almost evenly between a 140.42-square-foot mainsail and a 140.19-square-foot genoa. Rig dimensions are 30.51 feet for I and 9.19 feet for J.
Her heavy hull and modest sail plan govern her light-air manners. She isn’t built to sprint, but the stiff, predictable platform inspires confidence in a harbor or along a sheltered shore. Calculated hull speed is 6.33 knots.
Auxiliary power comes from a single 8-horsepower Bukh DV8 diesel. The boat is frankly under powered, and the originally very small 18-gallon fuel capacity compounds that limitation.
Accommodations and Cruising Range
The published specifications list zero cabins, zero berths, zero heads, and zero headroom. These figures reflect a database classification rather than a usable interior layout.
What is clear is the limited range imposed by the 18-gallon water tank and equally restricted fuel stowage. Both reinforce the LM 81’s coastal-cruiser brief. A buyer should consider extended anchorages and long motoring legs outside her design envelope.
Verdict
The LM 81 is a rare, purpose-built coastal cruiser from a single 1984 production run of 53 boats. Andersen gave her a genuinely stable, self-righting hull with a coastal temperament, but the under-powered rig and tiny fuel and water reserves limit her ambitions to sheltered waters. She’s a curious, collectible Danish design rather than a versatile cruiser.
Pros
- Very stable and stiff, with good righting capability if capsized
- Solid fiberglass construction with encapsulated ballast
- Compact, manageable size for coastal harbors
Cons
- Under powered, with only 8 HP and modest sail area
- Very small original fuel and water capacities
- Limited to coastal cruising by design and range
