J/40 Detailed Review

If you are a boat enthusiast looking to get more information on specs, built, make, etc. of different boats, then here is a complete review of J/40. Built by J Boats and designed by Rod Johnstone, the boat was first built in 1984. It has a hull type of Fin w/spade rudder and LOA is 12.19. Its sail area/displacement ratio 17.89. Its auxiliary power tank, manufactured by Volvo, runs on Diesel.

J/40 has retained its value as a result of superior building, a solid reputation, and a devoted owner base. Read on to find out more about J/40 and decide if it is a fit for your boating needs.

Boat Information

Boat Specifications

LOA:12.19 m / 39.99 ft
Rigging Type:Masthead Sloop
Hull Type:Fin w/spade rudder
S.A. (reported):71.07 m2 / 764.99 ft2
Draft (max):1.98 m / 6.50 ft
Displacement:8165 kg / 18000.72 lbs
Ballast:2948 kg / 6499.22 lbs
Ballast Type:Lead
Last Built:1993
Designers:Rod Johnstone
LWL:10.36 m / 33.99 ft

Sail Boat Calculation

Comfort Ratio:27.86
Capsize Screening Formula:1.86

Rig And Sail Specs

I:15.24 m / 50.00 ft
S.A. Fore:13.47 m / 44.19 ft
E:5.49 m / 18.01 ft
S.A. Fore:34.14 m2 / 367.48 ft2
S.A. Main:36.96 m2 / 397.83 ft2
S.A. Total (100% Fore + Main Triangles)71.1 m2 / 765.31 ft2

Auxillary Power Tank

Fuel:125 L / 33.02 gals


Water:227 L / 59.97 gals


Builders:J Boats
Designers:Rod Johnstone


Who designed the J/40?

J/40 was designed by Rod Johnstone.

Who builds J/40?

J/40 is built by J Boats.

When was J/40 first built?

J/40 was first built in 1984.

How long is J/40?

J/40 is 10.36 m in length.

What is mast height on J/40?

J/40 has a mast height of 13.47 m.

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