Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Fin with rudder on skeg
Rigging Type: Masthead Sloop
LOA: 40.83 ft
LWL: 31.17 ft
S.A. (reported): 738.00 ft²
Beam: 12.17 ft
Displacement: 16,890.00 lb
Max Draft: 6.30 ft
Construction: FG
First Built: 1978
Builder: Irwin Yachts (USA)
Designer: Ted Irwin

KLSC Leaderboard

KLSC Leaderboard

Auxiliary Power/Tanks (orig. equip.)

Fuel: 40 gals


Water: 90 gals

Sailboat Calculations

S.A. / Displ.: 18.00
Disp: / Len: 248.98
Comfort Ratio: 27.47
Capsize Screening Formula: 1.90
S#: 2.28
Hull Speed: 7.48 kn
Pounds/Inch Immersion: 1,355.42 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 50.00 ft
J: 16.50 ft
P: 44.00 ft
E: 14.80 ft
S.A. Fore: 412.50 ft²
S.A. Main: 325.60 ft²
S.A. Total (100% Fore + Main Triangles): 738.10 ft²
S.A./Displ. (calc.): 18.01
Est. Forestay Length: 52.65 ft

Sailboat Links

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


See IRWIN 39 CITATION which appears very similar.
Fixed keel shoal draft: 4.39'
Keel/cb: BU: 4.25'/BD: 7.0'