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IRWIN 31
Built by Irwin Yachts (USA)
• Designed by Ted Irwin
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General Information
Hull Type:
Keel/Cbrd.
Rigging Type:
Masthead Sloop
First Built:
1968
Dimensions
Length Overall (LOA):
9.47 m
Length Waterline (LWL):
6.78 m
Beam:
2.92 m
Draft (Max):
2.29 m
Draft (Min):
1.01 m
Weight & Ballast
Displacement:
4,354 kg
Ballast:
1,724 kg
Ballast Type:
Lead
Sail Plan
Foresail Area:
20.80 m²
Mainsail Area:
20.81 m²
Sail Area:
41.61 m²
Sail Area (reported):
41.62 m²
I (Fore Triangle Height):
11.28 m
J (Fore Triangle Base):
3.69 m
P (Mainsail Hoist):
9.75 m
E (Boom Length):
4.27 m
Est. Forestay Length:
11.87 m
Engine & Systems
Engine Make:
Universal
Engine Type:
Gas
Engine Model:
Atomic 4
Engine Power:
25 HP
Fuel Capacity:
95 L
Water Capacity:
189 L
Performance Ratios
Hull Speed:
6.32 knots
SA/Displacement (Calc):
15.92
SA/Displacement (Reported):
15.92
Ballast/Disp Ratio:
39.58%
Displacement/Length:
389.07
Comfort Ratio:
29.37
Capsize Screening:
1.81
S-Number:
1.13
Immersion:
136 kg/cm
Notes
TALL (sloop) RIG:
Market Value
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