Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Fin w/spade rudder
Rigging Type: Masthead Sloop
LOA: 13.00 m
LWL: 9.91 m
S.A. (reported): 77.30 m²
Beam: 3.51 m
Displacement: 9,072 kg
Ballast: 3,629 kg
Max Draft: 1.98 m
Construction: FG
Ballast Type: Lead
First Built: 1971
Last Built: 1972
# Built: 14
Builder: Jensen Marine (USA)
Designer: C. William Lapworth

KLSC Leaderboard

KLSC Leaderboard

Auxiliary Power/Tanks (orig. equip.)

Make: Universal
Type: Gas
Fuel: 151 L


Water: 265 L

Sailboat Calculations

S.A. / Displ.: 18.14
Bal. / Displ.: 40.00
Disp: / Len: 260.09
Comfort Ratio: 33.62
Capsize Screening Formula: 1.70
S#: 2.18
Hull Speed: 7.64 kn
Pounds/Inch Immersion: 1,335.45 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 15.85 m
J: 5.23 m
P: 13.84 m
E: 5.18 m
S.A. Fore: 41.45 m²
S.A. Main: 35.87 m²
S.A. Total (100% Fore + Main Triangles): 77.32 m²
S.A./Displ. (calc.): 18.14
Est. Forestay Length: 16.69 m

Sailboat Links

Designers: C. William Lapworth
Builders: Jensen Marine/Cal Boats
Download Boat Record:


A relatively rare Cal model that was in production for less than a year.
Diesel available as an option.