Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Fin with rudder on skeg
Rigging Type: Masthead Ketch
LOA: 12.65 m
LWL: 10.69 m
S.A. (reported): 74.60 m²
Beam: 4.11 m
Displacement: 11,340 kg
Ballast: 3,629 kg
Max Draft: 1.37 m
Construction: FG
First Built: 1982
Builder: Irwin Yachts (USA)
Designer: Ted Irwin

KLSC Leaderboard

KLSC Leaderboard

Auxiliary Power/Tanks (orig. equip.)

Make: Perkins
Model: 4-154
Type: Diesel
HP: 62
Fuel: 568 L


Water: 606 L

Sailboat Calculations

S.A. / Displ.: 15.09
Bal. / Displ.: 32.00
Disp: / Len: 258.53
Comfort Ratio: 32.61
Capsize Screening Formula: 1.85
S#: 1.91
Hull Speed: 7.94 kn
Pounds/Inch Immersion: 1,692.15 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 15.39 m
J: 5.58 m
P: 13.69 m
E: 4.63 m
S.A. Fore: 42.93 m²
S.A. Main: 31.70 m²
S.A. Total (100% Fore + Main Triangles): 74.63 m²
S.A./Displ. (calc.): 15.09
Est. Forestay Length: 16.37 m

Sailboat Links

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


Deep draft: 6.5'/1.98m
Keel/CB: BD: 10.08'/3.07m BU: 4.5'/1.37m