IRWIN 3/4 TON

Beta Marine

Beta Marine

Sailboat Specifications

Definitions
Hull Type: Fin with rudder on skeg
Rigging Type: Masthead Sloop
LOA: 34.00 ft / 10.36 m
LWL: 28.25 ft / 8.61 m
S.A. (reported): 529.00 ft² / 49.15 m²
Beam: 9.50 ft / 2.90 m
Displacement: 9,715.00 lb / 4,407 kg
Ballast: 4,500.00 lb / 2,041 kg
Max Draft: 4.50 ft / 1.37 m
Construction: FG
First Built: 1976
Builder: Irwin Yachts (USA)
Designer: Ted Irwin

Sailboat Calculations

Definitions
S.A. / Displ.: 18.65
Bal. / Displ.: 46.32
Disp: / Len: 192.37
Comfort Ratio: 24.97
Capsize Screening Formula: 1.78
S#: 2.99
Hull Speed: 7.12 kn
Pounds/Inch Immersion: 958.93 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

HELP
I: 43.80 ft / 13.35 m
J: 14.00 ft / 4.27 m
P: 37.10 ft / 11.31 m
E: 12.00 ft / 3.66 m
S.A. Fore: 306.60 ft² / 28.48 m²
S.A. Main: 222.60 ft² / 20.68 m²
S.A. Total (100% Fore + Main Triangles): 529.20 ft² / 49.16 m²
S.A./Displ. (calc.): 18.66
Est. Forestay Length: 45.98 ft / 14.01 m

Sailboat Links

Designers: Ted Irwin
Builders: Irwin Yachts
Associations: IOR 3/4 ton
Irwin Facebook Group
Irwin Yacht Owners
Download Boat Record:

Notes

See IRWIN 33/IRWIN 33 MKII.