IRWIN 28 MK III

Sailboat Specifications


Hull Type:
Fin with rudder on skeg
Rigging Type:
Masthead Sloop
LOA:
28.50 ft / 8.69 m
LWL:
23.00 ft / 7.01 m
Beam:
9.00 ft / 2.74 m
S.A. (reported):
377.00 ft2 / 35.02 m2
Draft (max):
4.50 ft / 1.37 m
Draft (min):
Displacement:
7,800 lb / 3,538 kg
Ballast:
3,000 lb / 1,361 kg
S.A./Disp.:
15.39
Bal./Disp.:
38.46
Disp./Len.:
286.20
Construction:
FG
Ballast Type:
Lead
First Built:
1974
Last Built:
1976
# Built:
Builder:
Irwin Yachts (USA)
Designer:
Ted Irwin
Website:

Auxiliary Power/Tanks (orig. equip.)

Make:
Atomic 4
Model:
Type:
Gas
HP:

Sailboat Calculations

S.A./Disp.:
15.39
Bal./Disp.:
38.46
Disp./Len.:
286.20
Comfort Ratio:
26.20
Capsize Screening Formula:
1.82

Rig and Sail Particulars

I:
37.00 ft / 11.28 m
J:
12.00 ft / 3.66 m
P:
31.70 ft / 9.66 m
E:
9.80 ft / 2.99 m
SPL/TPS:
ISP:
S.A. Fore:
222.00 ft2 / 20.62 m2
S.A. Main:
155.33 ft2 / 14.43 m2
S.A. Total (100% Fore + Main Triangles)
377.33 ft2 / 35.06 m2
S.A./Disp. (calc.):
15.40
Est. Forestay Len.:
38.90 ft / 11.86 m

Sailboat Links

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Notes

Keel/CB: draft BU: 3.0'/BD: 7.25' ballast: 3200 lbs.

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