Beta Marine

Sailboat Specifications

Hull Type: Fin w/bulb & spade rudder
Rigging Type: Fractional Sloop
LOA: 40.00 ft
LWL: 34.60 ft
S.A. (reported): 865.00 ft²
Beam: 11.91 ft
Displacement: 14,900.00 lb
Ballast: 5,600.00 lb
Max Draft: 7.22 ft
Construction: FG
Ballast Type: Lead
First Built: 2008
Builder: J Boats
Designer: Johnstone

KLSC Leaderboard

Auxiliary Power/Tanks (orig. equip.)

Make: Volvo
Type: Diesel
HP: 40
Fuel: 35 gals


Water: 42 gals

Sailboat Calculations

S.A. / Displ.: 22.94
Bal. / Displ.: 37.58
Disp: / Len: 160.59
Comfort Ratio: 23.46
Capsize Screening Formula: 1.94
S#: 3.97
Hull Speed: 7.88 kn
Pounds/Inch Immersion: 1,472.43 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 54.42 ft
J: 15.20 ft
P: 51.34 ft
E: 17.57 ft
ISP: 57.68 ft
S.A. Fore: 413.59 ft²
S.A. Main: 451.02 ft²
S.A. Total (100% Fore + Main Triangles): 864.61 ft²
S.A./Displ. (calc.): 22.93
Est. Forestay Length: 56.50 ft

Sailboat Links

Designers: Rod Johnstone
Builders: J Boats
J Composites (FRA)
Download Boat Record:


J/122E (built in France) has same hull and rig with updated deck, coach roof, and interior.