Beta Marine

Beta Marine

Sailboat Specifications

Definitions
Hull Type: Fin w/spade rudder
Rigging Type: Masthead Sloop
LOA: 40.00 ft
LWL: 34.00 ft
S.A. (reported): 765.00 ft²
Beam: 12.17 ft
Displacement: 18,000.00 lb
Ballast: 6,500.00 lb
Max Draft: 6.50 ft
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: 33 gals

Accomodations

Water: 60 gals

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: 50.00 ft
J: 14.70 ft
P: 44.20 ft
E: 18.00 ft
S.A. Fore: 367.50 ft²
S.A. Main: 397.80 ft²
S.A. Total (100% Fore + Main Triangles): 765.30 ft²
S.A./Displ. (calc.): 17.90
Est. Forestay Length: 52.12 ft

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