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IRWIN 28 MK III

Masthead Sloop • Fin with rudder on skeg • Built 1974–1976

Dimensions

LOA
28.5 ft
LWL
23 ft
Beam
9 ft
Max Draft
4.5 ft
Displacement
7,800 lbs
Ballast
3,000 lbs

Performance Ratios

Capsize Ratio ⓘ
1.81 (offshore safe)
SA/D Ratio ⓘ
15.3
D/L Ratio ⓘ
286
Ballast Ratio ⓘ
38.5%

Sail Plan

Sail Area
377 sq ft
I
37 ft
J
12 ft
P
31.7 ft
E
9.8 ft

Construction

Hull Type
Fin with rudder on skeg
Rig Type
Masthead Sloop
Hull Material
FG
Ballast Type
Lead

Production

First Built
1974
Last Built
1976
Number Built
—

Engine & Accommodations

Engine Make
Atomic 4
Engine Type
Gas
Notes:

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

Designer

Builder

Class Associations

Related Boats

Name LOA (ft) Year Rig
IRWIN 28 MK IV 28.42 1976 Masthead Sloop