Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Fin with rudder on skeg
Rigging Type: Cutter
LOA: 37.00 ft
LWL: 30.00 ft
S.A. (reported): 625.00 ft²
Beam: 11.50 ft
Displacement: 20,000.00 lb
Ballast: 7,800.00 lb
Max Draft: 4.00 ft
Construction: FG
First Built: 1982
Last Built: 1982
Builder: Irwin Yachts (USA)
Designer: Ted Irwin

KLSC Leaderboard

KLSC Leaderboard

Auxiliary Power/Tanks (orig. equip.)

Make: Perkins
Model: 4-108
Type: Diesel
Fuel: 85 gals


Water: 187 gals

Sailboat Calculations

S.A. / Displ.: 13.62
Bal. / Displ.: 39.00
Disp: / Len: 330.69
Comfort Ratio: 37.23
Capsize Screening Formula: 1.70
S#: 1.28
Hull Speed: 7.34 kn
Pounds/Inch Immersion: 1,232.72 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 42.00 ft
J: 17.50 ft
P: 35.50 ft
E: 14.50 ft
S.A. Fore: 367.50 ft²
S.A. Main: 257.38 ft²
S.A. Total (100% Fore + Main Triangles): 624.88 ft²
S.A./Displ. (calc.): 13.62
Est. Forestay Length: 45.50 ft

Sailboat Links

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


The last iteration of the very popular IRWIN 37.
Available with keel/cb. Cutter or staysail ketch.
Rig dimensions for ketch:
I: 42.0'
J: 17.5'
P: 35.5'
E: 12.75'
PY: 22.16'
EY: 8.33'