Beta Marine

Beta Marine

Sailboat Specifications

Definitions
Hull Type: Fin w/spade rudder
Rigging Type: Masthead Sloop
LOA: 12.19 m
LWL: 10.36 m
S.A. (reported): 71.07 m²
Beam: 3.71 m
Displacement: 8,165 kg
Ballast: 2,948 kg
Max Draft: 1.98 m
Construction: FG
Ballast Type: Lead
First Built: 1984
Last Built: 1993
# Built: 85
Builder: J Boats Tillotson Pearson (USA)
Designer: Johnstone

Auxiliary Power/Tanks (orig. equip.)

Make: Volvo
Type: Diesel
HP: 43
Fuel: 125 L

Accomodations

Water: 227 L

Sailboat Calculations

Definitions
S.A. / Displ.: 17.89
Bal. / Displ.: 36.11
Disp: / Len: 204.45
Comfort Ratio: 27.86
Capsize Screening Formula: 1.86
S#: 2.76
Hull Speed: 7.81 kn
Pounds/Inch Immersion: 1,478.48 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

HELP
I: 15.24 m
J: 4.48 m
P: 13.47 m
E: 5.49 m
S.A. Fore: 34.14 m²
S.A. Main: 36.96 m²
S.A. Total (100% Fore + Main Triangles): 71.10 m²
S.A./Displ. (calc.): 17.90
Est. Forestay Length: 15.89 m

Sailboat Links

Designers: Rod Johnstone
Builders: J Boats
Associations: J/40 Owners
Download Boat Record:

Notes

Draft-wing keel: 5.40'/1.65m
Shallow draft fin: 5.00'/1.52m