Masthead Sloop
• Fin with rudder on skeg
• Built 1971–1975
Dimensions
LOA
37 ft
LWL
30 ft
Beam
11.5 ft
Max Draft
5.5 ft
Displacement
18,000 lbs
Ballast
6,700 lbs
Performance Ratios
Capsize Ratio ⓘ
1.75
(offshore safe)
SA/D Ratio ⓘ
13.0
D/L Ratio ⓘ
298
Ballast Ratio ⓘ
37.2%
Sail Plan
Sail Area
558 sq ft
I
42 ft
J
14.33 ft
P
35.5 ft
E
14.5 ft
Construction
Hull Type
Fin with rudder on skeg
Rig Type
Masthead Sloop
Hull Material
FG
Ballast Type
—
Production
First Built
1971
Last Built
1975
Number Built
—
Engine & Accommodations
Engine Make
Perkins
Engine Model
4-107
Power
40 hp
Engine Type
Diesel
Water
50 gal
Fuel
80 gal
Notes: The IRWIN 37 was promoted as a no compromise cruising boat. \nIntroduced in 1971 it was one of this builders most successful models though undergoing numerous changes until production ended in 1982. It's been said that nearly nearly 600 were sold.\nAvailable as sloop, cutter or ketch. \nKEEL OPTIONS:\nShoal draft fixed keel: 4.92'\nKeel/cb version: (draft: 4.0' board up)\nAlso available with a 50 HP Perkins 4-108\n****************************************************\nIRWIN 37-2 (1976 - bowsprit added which continued for all remaining models.)\nIRWIN 37-3 \nIRWIN 37-4 (1977)\nIRWIN 37-5 (1982 last model year).\n