Design and Construction
The Classic 50 measures 41.57 feet on the waterline and just over 15 feet in beam, giving her more volume than many boats in her size class. Her length-to-beam ratio is 3.31, making her roomier than 73 percent of similar designs.
The hull and deck are solid fiberglass. She carries a fin keel, with draft varying from roughly 6.92 to 7.22 feet depending on load. Her ballast ratio is 30 percent, higher than that of 21 percent of comparable sailboat designs.
A displacement-length ratio of 192 places the boat among moderate racers; 66 percent of similar designs are rated heavier. Her Motion Comfort Ratio is 28.9, making her more comfortable than only 27 percent of comparable designs. A capsize screening value of 1.92 would, by that formula alone, admit her to ocean racing. These figures aren’t superlatives, but measured standings against her peers.
Rig, Handling, and Performance
The Classic 50 is a masthead sloop with a sail-area-to-displacement ratio of 21.70 and about 688 square feet of wetted surface. The fin keel provides splendid maneuverability, although it sacrifices some directional stability compared with a long-keel arrangement.
Sheet specifications are generous for a yacht of this size. The jib and genoa sheets are about 49.9 feet long and 5/8-inch in diameter, the mainsheet is about 124.8 feet long, and the spinnaker sheets are about 109.9 feet long. All are sized for secure control under load.
Theoretical hull speed is 8.6 knots. Calculated maximum speed under the 78 hp Volvo Penta diesel is about 7.6 knots, rising to 7.7 knots with an 80 hp installation.
Accommodations and Capacities
Below, the boat has 10-plus-2 berths, a layout capacity that reflects her volume rather than a minimal cruising footprint. Fresh-water capacity is 696 liters, while fuel capacity is 500 liters. Those figures support extended independent cruising for a crew of that size.
The beamy hull behind her roomier-than-73-percent standing also underpins this accommodation plan.
Known Issues
The construction and performance characteristics of the Dufour Classic 50 show no recurring failures particular to the design.
Verdict
The Dufour Classic 50 is a big, beamy French cruiser with a reasoned performance pedigree. Her fin keel and moderate-racer displacement index make her handy and reasonably quick for her length, while the Berret-Poncin layout provides exceptional volume compared with her peers.
The trade-offs are predictable: less directional steadiness than a long-keeled yacht and a comfort ratio that trails most comparable boats.
Pros
- Roomier than 73 percent of similar sailboat designs by length-to-beam ratio
- Fin keel provides splendid maneuverability
- 10-plus-2 berths, with 696 liters of fresh water and 500 liters of fuel capacity
- Capsize screening value of 1.92 admits ocean-race eligibility by that formula
Cons
- Less directional stability than a long-keel yacht
- More comfortable than only 27 percent of similar designs by Motion Comfort Ratio
- Moderate-racer displacement means she is lighter than 66 percent of her peers
