Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Fin with rudder on skeg
Rigging Type: Masthead Sloop
LOA: 12.19 m
LWL: 9.91 m
S.A. (reported): 71.63 m²
Beam: 3.73 m
Displacement: 9,072 kg
Ballast: 3,175 kg
Max Draft: 1.37 m
Construction: FG
First Built: 1984
Last Built: 1988
Builder: Irwin Yachts (USA)
Designer: Ted Irwin

KLSC Leaderboard

KLSC Leaderboard

Auxiliary Power/Tanks (orig. equip.)

Make: Perkins
Model: 4-108
Type: Diesel
HP: 50
Fuel: 227 L


Water: 530 L

Sailboat Calculations

S.A. / Displ.: 16.81
Bal. / Displ.: 35.00
Disp: / Len: 260.09
Comfort Ratio: 31.62
Capsize Screening Formula: 1.81
S#: 2.06
Hull Speed: 7.64 kn
Pounds/Inch Immersion: 1,422.54 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 15.16 m
J: 5.26 m
P: 13.03 m
E: 4.88 m
S.A. Fore: 39.86 m²
S.A. Main: 31.77 m²
S.A. Total (100% Fore + Main Triangles): 71.64 m²
S.A./Displ. (calc.): 16.81
Est. Forestay Length: 16.05 m
Mast Height from DWL: 16.46 m

Sailboat Links

Designers: Ted Irwin
Builders: Irwin Yachts
Associations: Irwin Facebook Group
Irwin Yacht Owners
Download Boat Record:


Keel-centerboard version - BU:4.5' BD:9.67'.
Also available with a 44 HP Yanmar 4JHBE.