IRWIN 31

IRWIN 31 photo

Sailboat Specifications


Hull Type:
Keel/Cbrd.
Rigging Type:
Masthead Sloop
LOA:
31.08 ft / 9.47 m
LWL:
22.25 ft / 6.78 m
Beam:
9.58 ft / 2.92 m
S.A. (reported):
448.00 ft2 / 41.62 m2
Draft (max):
7.50 ft / 2.29 m
Draft (min):
3.33 ft / 1.01 m
Displacement:
9,600 lb / 4,354 kg
Ballast:
3,800 lb / 1,724 kg
S.A./Disp.:
15.92
Bal./Disp.:
39.58
Disp./Len.:
389.07
Construction:
FG w/balsa cored deck
Ballast Type:
Lead
First Built:
1968
Last Built:
# Built:
Builder:
Irwin Yachts (USA)
Designer:
Ted Irwin
Website:

Auxiliary Power/Tanks (orig. equip.)

Make:
Universal
Model:
Atomic 4
Type:
Gas
HP:
25
Water:
50 gals / 189 L
Fuel:
25 gals / 95 L

Sailboat Calculations

S.A./Disp.:
15.92
Bal./Disp.:
39.58
Disp./Len.:
389.07
Comfort Ratio:
29.37
Capsize Screening Formula:
1.81

Rig and Sail Particulars

I:
37.00 ft / 11.28 m
J:
12.10 ft / 3.69 m
P:
32.00 ft / 9.75 m
E:
14.00 ft / 4.27 m
SPL/TPS:
ISP:
S.A. Fore:
223.85 ft2 / 20.80 m2
S.A. Main:
224.00 ft2 / 20.81 m2
S.A. Total (100% Fore + Main Triangles)
447.85 ft2 / 41.61 m2
S.A./Disp. (calc.):
15.92
Est. Forestay Len.:
38.93 ft / 11.87 m

Sailboat Links

Designers:
Builders:

Notes

TALL (sloop) RIG:
I: 39'
J: 12.1'
P: 34.0'
E: 14.0'
Disp.: 9600 lbs.
Bsl.: 3800 lbs.
Also offered as a yawl.
(info provided by user)

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