J/121 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/121. Built by J Boats and designed by Alan Johnstone, the boat was first built in 2018. It has a hull type of Fin w/bulb & spade rudder and LOA is 12.19. Its sail area/displacement ratio 29.54. Its auxiliary power tank, manufactured by Yanmar, runs on Diesel.

J/121 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/121 and decide if it is a fit for your boating needs.

Boat Information

Boat Specifications

LOA:12.19 m / 39.99 ft
Rigging Type:Fractional Sloop
Hull Type:Fin w/bulb & spade rudder
S.A. (reported):89.09 m2 / 958.96 ft2
Draft (max):2.36 m / 7.74 ft
Displacement:5398 kg / 11900.54 lbs
Ballast:2177 kg / 4799.46 lbs
Construction:Infused FG/Epoxy with balsa core.
Ballast Type:Cast iron fin/lead bulb
Designers:Alan Johnstone
LWL:10.91 m / 35.79 ft

Sail Boat Calculation

Comfort Ratio:17.55
Capsize Screening Formula:2.16

Rig And Sail Specs

I:15.67 m / 51.41 ft
S.A. Fore:15.24 m / 50.00 ft
E:5.07 m / 16.63 ft
S.A. Fore:36.54 m2 / 393.31 ft2
S.A. Main:38.65 m2 / 416.03 ft2
S.A. Total (100% Fore + Main Triangles)75.19 m2 / 809.34 ft2

Auxillary Power Tank



Builders:J Boats
Designers:Alan Johnstone


Who designed the J/121?

J/121 was designed by Alan Johnstone.

Who builds J/121?

J/121 is built by J Boats.

When was J/121 first built?

J/121 was first built in 2018.

How long is J/121?

J/121 is 10.91 m in length.

What is mast height on J/121?

J/121 has a mast height of 15.24 m.

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