Design and Construction
The Bi-Loup 9 has a solid-fiberglass hull and deck, iron ballast, and a bilge-keel, or twin-keel, configuration. She measures 9 meters overall, 8.1 meters on the waterline, and 3 meters in beam. Her wetted surface is about 24 square meters.
Her length-to-beam ratio of 3.00 makes her beamier than 58 percent of comparable sailboat designs. That proportion also gives her more room than most similar designs when compared by length-to-beam spread.
The boat displaces 2,800 kg, including 950 kg of iron ballast. Her 34 percent ballast ratio is higher than that of only 15 percent of similar designs. A displacement-to-length ratio of about 147 puts her in the “light racer” category, with 90 percent of comparable designs weighing more.
Her comfort ratio is 16.4, which still reads as more comfortable than 15 percent of similar boats. The capsize screening figure of 2.15 would bar her from ocean-race acceptance.
Rig, Performance, and Handling
The Bi-Loup 9 carries a masthead-sloop rig with 25.92 square meters of sail area. Her sail-area-to-displacement ratio is about 13.3, enough to keep her lively for her weight, while her theoretical hull speed is 6.9 knots.
Depending on load, the twin keels limit draft to between 0.90 and 1.00 meter. That allows her to enter shallow marinas beyond the reach of deeper fin-keel boats.
Period standing-rigging and sheet specifications list:
- Jib and genoa sheets: 9.0 meters long and 10 mm in diameter
- Mainsheet: 22.5 meters long and 10 mm in diameter
- Spinnaker sheets: 19.8 meters long and 10 mm in diameter
A new owner can use those dimensions to confirm replacement lengths.
Known Issues
The sources identify no physical defects. Their only cautions concern the boat’s performance category. Her capsize screening value of 2.15 places her outside ocean-race eligibility, while her light-racer displacement profile puts her among the lightest 10 percent of comparable boats. These are design characteristics rather than faults requiring repair.
Refits and Ownership
Only 30 Bi-Loup 9s were built, and production ended in 1988. That makes the model scarce and leaves owners effectively on their own for class support.
The straightforward specification—solid-fiberglass hull and deck, iron ballast, and a masthead rig—means routine refit planning follows standard fiberglass-and-iron practice. However, the sources identify no model-specific campaigns, recalls, or common upgrade paths.
The Verdict
The Bi-Loup 9 is a rare, light-displacement French twin-keeler. Her shallow draft suits coastal waters and marinas, while her 3-meter beam provides comparatively generous space within a nine-meter hull. She trades ocean-race eligibility for that shallow-water access and beamy hull. The trade-off is a capsize screening figure that rules her out for ocean-race acceptance.
With solid-fiberglass construction, a conventional masthead rig, and modest production numbers, she is best understood as a coastal cruiser-racer rather than a bluewater candidate.
Pros
- Twin keels keep draft to between 0.90 and 1.00 meter, improving access to shallow marinas
- A 3.00 length-to-beam ratio makes her beamier and roomier than most similar designs
- Light-racer displacement and a 13.3 sail-area-to-displacement ratio support brisk performance
Cons
- A capsize screening value of 2.15 excludes her from ocean-race acceptance
- Only 30 were built, limiting class support and spares networks
- Her ballast ratio is higher than that of just 15 percent of similar designs
