IRWIN 1/2 TON

IRWIN 1/2 TON

Beta Marine

Beta Marine

Sailboat Specifications

Definitions
Hull Type: Lifting Keel
Rigging Type: Masthead Sloop
LOA: 32.00 ft
LWL: 24.42 ft
S.A. (reported): 390.00 ft²
Beam: 10.25 ft
Displacement: 7,300.00 lb
Ballast: 2,000.00 lb
Max Draft: 6.50 ft
Min Draft: 3.50 ft
Construction: FG
Ballast Type: Lead
First Built: 1976
Builder: Irwin Yacht & Marine Corporation (USA)
Designer: Ted Irwin

Auxiliary Power/Tanks (orig. equip.)

Make: Volvo
Model: MB 2A
Type: Gas
Fuel: 6 gals

Accomodations

Water: 12 gals

Sailboat Calculations

Definitions
S.A. / Displ.: 16.63
Bal. / Displ.: 27.40
Disp: / Len: 223.79
Comfort Ratio: 19.04
Capsize Screening Formula: 2.12
S#: 2.40
Hull Speed: 6.62 kn
Pounds/Inch Immersion: 894.37 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

HELP
I: 39.00 ft
J: 12.00 ft
P: 33.17 ft
E: 9.42 ft
S.A. Fore: 234.00 ft²
S.A. Main: 156.23 ft²
S.A. Total (100% Fore + Main Triangles): 390.23 ft²
S.A./Displ. (calc.): 16.64
Est. Forestay Length: 40.80 ft
Mast Height from DWL: 42.25 ft

Sailboat Links

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

Notes

A shoal draft, fixed keel version was also available. Draft: 5.5'.