Irwin 25

Description

The Irwin 25 (1969–1974) is one of Ted Irwin’s earliest production designs and an iconic “big little boat” of the early 1970s, with more than 300 built. At 25 ft LOA (22 ft 2 in LWL), 8 ft beam, and only 4 ft 2 in draft with the swing keel up (5 ft 5 in down), she was conceived as an inexpensive, trailerable family cruiser that still offered standing headroom and genuine weekender comfort. Displacement is a light 3,800 lb. with 1,400 lb. of lead in the keel stub (plus the retractable steel centerboard), and the masthead sloop rig carries a generous 310–320 sq ft—enough to make her surprisingly quick for her day (PHRF around 240–255). Below, she has a full-height enclosed head, a small but usable galley, a dinette that drops to make a double, and a narrow quarter berth—sleeping four in reasonable comfort or six if everyone is friendly. Simple, ruggedly built, and fitted with an inboard atomic 4 or outboard in a well, the Irwin 25 became a favorite on the Great Lakes, Chesapeake, and Florida; many are still actively sailed and raced today, often with updated rigs and interiors, and the design is widely regarded as one of the best-value 25-footers ever produced in the United States.

Construction Details

Designer Ted Irwin
Builder Irwin Yachts
Length 25.420 ft
LOA 25.420 ft
LWL 20.500 ft
Beam 8.000 ft
Displacement 5400 lb
Max Draft 6.670 ft
Min Draft 2.670 ft
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The standard boat dimensions

i 31.25 ft
j 10 ft
p 26.38 ft
e 11 ft
p2 -
e2 -
i2 -
j2 -

Blueprints

Sails

Irwin 25 - MAINSAIL

Luff 26.375 ft - (8039 mm)
Foot 11 ft - (3353 mm)
Leech * 28.06 ft - (8553 mm)
Tack Angle * 88.17 °
Diagonal 28.25 ft - (8611 mm)
Head (inches) 4 in - (102 mm)
Area * 148.85 ft²
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Irwin 25 - JIBSAIL

Luff 26.25 ft - (8001 mm)
Foot 12 ft - (3658 mm)
Leech 25 ft - (7620 mm)
Percentage LP * 113.3 %
Length Perpendicular * 11.33 ft - (3453 mm)
Deck Angle * 1.54 °
Area * 148.66 ft²
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Irwin 25 - JIBSAIL

Luff 27.42 ft - (8358 mm)
Foot 11.5 ft - (3505 mm)
Leech 24.33 ft - (7416 mm)
Percentage LP * 101.9 %
Length Perpendicular * 10.19 ft - (3106 mm)
Deck Angle * 9.85 °
Area * 139.73 ft²
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Irwin 25 - GENOA

Luff 30 ft - (9144 mm)
Foot 14.5 ft - (4420 mm)
Leech 28.25 ft - (8611 mm)
Percentage LP * 135.3 %
Length Perpendicular * 13.53 ft - (4124 mm)
Deck Angle * 3.28 °
Area * 203.01 ft²
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Irwin 25 - GENOA

Luff 31.83 ft - (9702 mm)
Foot 15.75 ft - (4801 mm)
Leech 30.92 ft - (9424 mm)
Percentage LP * 150 %
Length Perpendicular * 15 ft - (4572 mm)
Deck Angle * -0.03 °
Area * 238.77 ft²
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Irwin 25 - GENOA

Luff 28.92 ft - (8815 mm)
Foot 14.33 ft - (4368 mm)
Leech 27.25 ft - (8306 mm)
Percentage LP * 133.6 %
Length Perpendicular * 13.36 ft - (4072 mm)
Deck Angle * 3.41 °
Area * 193.24 ft²
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Irwin 25 - ASYMMETRICAL

Luff 32 ft - (9754 mm)
Foot 17 ft - (5182 mm)
Leech 29 ft - (8839 mm)
Perc LP * 165 %
Area * 408 ft²
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Irwin 25 - SPINNAKER

Stays * 31.17 ft - (9501 mm)
MidGirth * 18 ft - (5486 mm)
Foot * 18 ft - (5486 mm)
Perc LP * 180 %
Area * 477 ft²
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Disclaimer. Boats are not all the same -- even when produced in the same factory of the same model. Sailrite does its best to publish accurate dimensions, but we often find it worthwhile to have our customers measure their boats carefully before we produce kits for them. You should take the same precautions, especially when the data is not from Sailrite. The information on this site is not guaranteed to be accurate. Sailrite offers this content as a service to our community, but takes no responsibility for the reliability of the data provided.

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