Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Fin with rudder on skeg
Rigging Type: Masthead Ketch
LOA: 41.50 ft
LWL: 35.08 ft
S.A. (reported): 803.00 ft²
Beam: 13.50 ft
Displacement: 25,000.00 lb
Ballast: 8,000.00 lb
Max Draft: 4.50 ft
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: 150 gals


Water: 160 gals

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: 50.50 ft
J: 18.30 ft
P: 44.90 ft
E: 15.20 ft
S.A. Fore: 462.08 ft²
S.A. Main: 341.24 ft²
S.A. Total (100% Fore + Main Triangles): 803.32 ft²
S.A./Displ. (calc.): 15.09
Est. Forestay Length: 53.71 ft

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