IRWIN 28 MK IV

IRWIN 28 MK IV

Beta Marine

Beta Marine

Sailboat Specifications

Definitions
Hull Type: Fin with rudder on skeg
Rigging Type: Masthead Sloop
LOA: 28.42 ft / 8.66 m
LWL: 23.00 ft / 7.01 m
S.A. (reported): 377.00 ft² / 35.02 m²
Beam: 9.00 ft / 2.74 m
Displacement: 7,800.00 lb / 3,538 kg
Ballast: 3,200.00 lb / 1,451 kg
Max Draft: 4.50 ft / 1.37 m
Construction: FG
Ballast Type: Lead
First Built: 1976
Last Built: 1981
Builder: Irwin Yachts (USA)
Designer: Ted Irwin

Sailboat Calculations

Definitions
S.A. / Displ.: 15.39
Bal. / Displ.: 41.03
Disp: / Len: 286.20
Comfort Ratio: 26.22
Capsize Screening Formula: 1.82
S#: 1.72
Hull Speed: 6.43 kn
Pounds/Inch Immersion: 739.63 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

HELP
I: 37.00 ft / 11.28 m
J: 12.00 ft / 3.66 m
P: 31.67 ft / 9.65 m
E: 9.75 ft / 2.97 m
S.A. Fore: 222.00 ft² / 20.62 m²
S.A. Main: 154.39 ft² / 14.34 m²
S.A. Total (100% Fore + Main Triangles): 376.39 ft² / 34.97 m²
S.A./Displ. (calc.): 15.36
Est. Forestay Length: 38.90 ft / 11.86 m

Sailboat Links

Designers: Ted Irwin
Builders: Irwin Yachts
Associations: Irwin Facebook Group
Irwin Yacht Owners
Related Sailboats: IRWIN 28
Download Boat Record:

Notes

Keel/CB version also available.