Beta Marine

Beta Marine

Sailboat Specifications

Definitions
Hull Type: Fin w/transom hung rudder
Rigging Type: Fractional Sloop
LOA: 22.74 ft / 6.93 m
LWL: 20.47 ft / 6.24 m
S.A. (reported): 226.00 ft² / 21.00 m²
Beam: 7.38 ft / 2.25 m
Displacement: 1,790.00 lb / 812 kg
Ballast: 628.00 lb / 285 kg
Max Draft: 4.92 ft / 1.50 m
Construction: FG
Ballast Type: Lead
First Built: 2012
# Built: 1100
Builder: J Boats (USA)
Designer: Alan Johnstone

Sailboat Calculations

Definitions
S.A. / Displ.: 24.58
Bal. / Displ.: 35.08
Disp: / Len: 93.16
Comfort Ratio: 9.12
Capsize Screening Formula: 2.43
S#: 5.60
Hull Speed: 6.06 kn
Pounds/Inch Immersion: 539.78 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

HELP
I: 26.77 ft / 8.16 m
J: 7.68 ft / 2.34 m
P: 26.16 ft / 7.97 m
E: 9.44 ft / 2.88 m
ISP: 30.15 ft / 9.19 m
S.A. Fore: 102.80 ft² / 9.55 m²
S.A. Main: 123.48 ft² / 11.47 m²
S.A. Total (100% Fore + Main Triangles): 226.28 ft² / 21.02 m²
S.A./Displ. (calc.): 24.61
Est. Forestay Length: 27.85 ft / 8.49 m

Sailboat Links

Designers: Alan Johnstone
Builders: J Boats
Associations: J/70 Class Association
J/70 International Class Association
Download Boat Record:

Notes

Spinnaker (asym.) area: 491 sq.ft./45 m²
More than 1100 delivered as of 2016.