Design and Construction
The Fast 40 measures 12.14 meters overall with a 10.97-meter waterline, a 2.44-meter beam, and a lifting keel hull type that draws 2.29 meters at maximum and 1.07 meters when raised. The hull is a Divinicell sandwich construction with a lead keel, and the recorded displacement is 1860 kilograms backed by 907 kilograms of ballast. Adler’s original brief favored a narrow, lightweight yacht, and the proportions bear that out in a displacement-to-length ratio of 39.27 and a ballast-to-displacement ratio near 48.76 percent.
Rig and Handling
The boat carries a fractional sloop rig with an I of 11.2 meters and a J of 3.66 meters, while the mainsail and fore sail combine for a total sail area of 43.42 square meters. A sail-area-to-displacement ratio of 29.31 and an S# of 7.95 place the design among lively performers, with a maximum hull speed of 8.04 knots and a capsize screening result of 2.00. The comfort ratio of 10.68 reflects the tradeoff inherent in the light, narrow concept rather than a soft-riding cruiser.
Accommodations
The ledger documents no interior arrangement, layout dimensions, or cruising amenities for the Fast 40 beyond the hull and rig parameters above. What is recorded is the design intent for a narrow, lightweight yacht rather than a voluminous cabin platform, and the 2.44-meter beam suggests modest interior beam compared with wider contemporary cruisers.
Known Issues
No structural defects, systemic failures, or owner-reported faults are recorded in the available authority extracts for the Fast 40. The limited production of 18 boats and the foam-sandwich construction imply that any used example will hinge on individual care rather than a known class-wide weakness.
Refits and Ownership
Ownership of a Fast 40 means joining a very small group, with only 18 ever launched from the North End Marine batch. The lifting keel and Divinicell sandwich hull are defining features to maintain, and the boat’s low production run means spares and class support are likely informal rather than organized.
The Verdict
The Fast 40 is a rare, purpose-driven design that translated one designer’s article into a small but coherent series of light, narrow racer-cruisers. Its numbers show a quick, easily driven hull with a practical lifting keel, though the minimal beam and low comfort ratio will not suit those seeking a plush coastal home.
Pros
- Narrow, lightweight hull concept from Alan Adler’s documented design brief
- Lifting keel with 1.07-meter minimum draft for shallow access
- Lively performance ratios including S# of 7.95 and SA/Disp of 29.31
Cons
- Only 18 built, limiting class support and spare availability
- Low comfort ratio of 10.68 and narrow beam imply sparse accommodations
- No recorded interior or equipment detail in authority sources
