J/121

J/121 photo J/121 drawing

Sailboat Specifications


Hull Type:
Fin w/bulb & spade rudder
Rigging Type:
Fractional Sloop
LOA:
40.00 ft / 12.19 m
LWL:
35.78 ft / 10.91 m
Beam:
12.30 ft / 3.75 m
S.A. (reported):
959.00 ft2 / 89.09 m2
Draft (max):
7.75 ft / 2.36 m
Displacement:
11,900 lb / 5,398 kg
Ballast:
4,800 lb / 2,177 kg
S.A./Disp.:
29.54
Bal./Disp.:
40.34
Disp./Len.:
115.98
Construction:
Infused FG/Epoxy with balsa core.
Ballast Type:
Cast iron fin/lead bulb
First Built:
2018
Builder:
J Boats
Designer:
Alan Johnstone

Auxiliary Power/Tanks (orig. equip.)

Make:
Yanmar
Type:
Diesel
HP:
30

Sailboat Calculations

S.A./Disp.:
29.54
Bal./Disp.:
40.34
Disp./Len.:
115.98
Comfort Ratio:
17.55
Capsize Screening Formula:
2.16
S#:
5.11

Rig and Sail Particulars

I:
51.41 ft / 15.67 m
J:
15.30 ft / 4.66 m
P:
50.00 ft / 15.24 m
E:
16.64 ft / 5.07 m
S.A. Fore:
393.29 ft2 / 36.54 m2
S.A. Main:
416.00 ft2 / 38.65 m2
S.A. Total (100% Fore + Main Triangles)
809.29 ft2 / 75.19 m2
S.A./Disp. (calc.):
24.93
Est. Forestay Len.:
53.64 ft / 16.35 m

Notes

The J/121 includes a water ballast system with a 104 gal (394 liter) tank on each side. This system allows up to an additional 867 lbs (approx) to the rail.
Some specs and photo are from a review by Adam Cort in Sail Mag. Feb 8, 2018.

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