Home/ Boats/ Kirié (Fra)/ Fifty 40
Sailboat Specifications

Fifty 40

Masthead Sloop · Fin With Rudder On Skeg

Designed by Michel Joubert · Built by Kirié (Fra) · First built 1979

+ Add to Compare
LOA 40.68 ft  ·  Beam 12.80 ft  ·  Displacement 19,841.00 lb  ·  Sail Area 780.00 ft²  ·  Masthead Sloop  ·  Fin With Rudder On Skeg
About the Fifty 40 Sailboat

Designed by renowned French naval architect Michel Joubert and built by Kirié in France from 1979 to 1986, this sophisticated 40-footer represents quality European craftsmanship from the early 1980s. The Fifty 40's moderate displacement of 19,841 pounds and well-balanced proportions create a versatile platform equally suited for coastal cruising and offshore passages. The masthead sloop rig delivers respectable performance with 780 square feet of sail area, while the fin keel with rudder on skeg configuration provides excellent tracking and directional stability—particularly valuable for extended cruising. With a comfort ratio of 28.49, this design strikes an appealing balance between seaworthiness and sailing performance, offering enough motion damping for comfortable offshore work without sacrificing responsiveness. The hull's fiberglass construction reflects the solid European building standards of the era, and the boat's 6,173-pound ballast provides reassuring stability for serious cruising applications. Her capsize screening formula of 1.89 indicates good offshore capability, while the generous beam of 12.80 feet creates substantial interior volume for extended voyaging. This French design embodies the philosophy of capable, comfortable cruising boats that defined the European sailing scene of the early 1980s.

Dimensions & Specifications
LOA (Length Overall) 40.68 ft / 12.40 m
LWL (Waterline Length) 34.12 ft / 10.40 m
Beam 12.80 ft / 3.90 m
Max Draft 5.41 ft / 1.65 m
Displacement 19,841.00 lb / 9,000 kg
Ballast 6,173.00 lb / 2,800 kg
Sail Area (Reported) 780.00 ft² / 72.46 m²
Design & Construction
Hull Type Fin with rudder on skeg
Rigging Type Masthead Sloop
Construction FG
Designer Michel Joubert
Builder Kirié (FRA)
First Built 1979
Last Built 1986
Related Sailboats First 405 Beneteau · Cc 41 · Swan 411 · Tartan 412 · Dehler 41 Ds
Owner Reviews

No owner reviews yet — be the first to share your experience with this boat.

Engine & Accommodations
Engine Make Perkins
Engine Type Diesel
Horsepower 82
Fuel Capacity 103 gals / 390 L
Water Capacity 132 gals / 500 L
Frequently Asked Questions

What is the Fifty 40's sail area to displacement ratio?

The Fifty 40 has a Sail Area to Displacement ratio (SA/D) of 17.09. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Fifty 40's comfort ratio?

The Fifty 40 has a Ted Brewer Comfort Ratio of 28.49. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Fifty 40 safe for offshore sailing?

The Fifty 40 has a Capsize Screening Formula value of 1.89. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Fifty 40?

The theoretical hull speed of the Fifty 40 is 7.83 kn knots, calculated from its waterline length.

How much does a Fifty 40 weigh?

The Fifty 40 has a displacement of 19,841.00 lb and a length overall (LOA) of 40.68 ft.

Who designed the Fifty 40?

The Fifty 40 was designed by Michel Joubert, first built in 1979.