Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Fin with rudder on skeg
Rigging Type: Masthead Sloop
LOA: 9.35 m
LWL: 8.00 m
S.A. (reported): 35.02 m²
Beam: 3.07 m
Displacement: 3,500 kg
Ballast: 1,590 kg
Max Draft: 1.65 m
Construction: FG
Ballast Type: Lead
First Built: 1978
# Built: 250
Builder: BK Marin (SWE)
Designer: Harry Becker/Rolf Magnusson/Bengt Karlsson

KLSC Leaderboard

KLSC Leaderboard

Auxiliary Power/Tanks (orig. equip.)

Make: Yanmar
Type: Diesel
HP: 12

Sailboat Calculations

S.A. / Displ.: 15.50
Bal. / Displ.: 45.43
Disp: / Len: 190.44
Comfort Ratio: 19.95
Capsize Screening Formula: 2.04
S#: 2.63
Hull Speed: 6.87 kn
Pounds/Inch Immersion: 944.51 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 11.70 m
J: 3.35 m
P: 10.30 m
E: 3.00 m
S.A. Fore: 19.60 m²
S.A. Main: 15.45 m²
S.A. Total (100% Fore + Main Triangles): 35.04 m²
S.A./Displ. (calc.): 15.51
Est. Forestay Length: 12.17 m

Sailboat Links

Designers: Bengt Karlsson
Harry Becker
Rolf Magnusson
Builders: BK Marin AB
Mamba Boats (SWE)
Associations: Half Ton Class
Download Boat Record:


Designed as IOR 1/2 ton.