Irwin 37-5 Information, Review, Specs

Boat drawing
Make
Irwin
Model
37-5
Number Built
Production Year(s)
1982

The Irwin 37-5 is a cruising sailboat designed by the prolific Ted Irwin and produced by Irwin Yachts in 1982. Representing the final iteration of the highly popular Irwin 37 series, this model solidified the company's reputation for creating comfortable and spacious cruising vessels. With a length overall of 37 feet and a waterline length of 30 feet, the 37-5 was crafted to appeal to sailors prioritizing comfortable living at anchor and generous interior accommodations over aggressive racing performance.

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The story of the Irwin 37-5 is rooted in Ted Irwin's comprehensive design philosophy, which aimed to serve a broad spectrum of sailors, often balancing performance with cruising comfort. While Irwin Yachts was known for producing successful racing boats, a significant portion of their output, including the Irwin 37 series, was tailored for the burgeoning yacht charter market, emphasizing practicality and livability. The original Irwin 37 was introduced in 1971 and underwent numerous modifications over its production run, with the 37-5 emerging as the ultimate version in 1982, the year production for the series concluded. A notable design evolution across the Irwin 37 series was the introduction of a bowsprit on the second version, a feature that remained in subsequent models, including the 37-5. The 37-5 was offered with a fin keel and could be rigged as a cutter or a staysail ketch.

Sailing Performance and Handling

The Irwin 37-5, with its design philosophy leaning towards comfort, exhibits characteristics typical of a classic cruising boat. Its Sail Area to Displacement (SA/D) ratio, calculated at approximately 13.56, suggests moderate performance, particularly in lighter winds, aligning with its role as a comfortable cruiser rather than a light-air flyer. The Ballast to Displacement ratio of 0.39 indicates a stable vessel, capable of standing up to a decent breeze, though it may not be as exceptionally stiff as boats with a higher ratio. Furthermore, the Displacement to Length (D/L) ratio of approximately 330.6 firmly places the Irwin 37-5 in the heavier, more traditional cruiser category. Owners and reviewers often note that while the Irwin 37 series may not be lauded for its outright sailing performance or intricate construction details, it compensates with excellent comfort at anchor and spacious berths.

Accommodations and Layout

The interior of the Irwin 37-5 was a primary selling point, designed to offer a "cozier, home-y look" that instantly appealed to cruisers. The model is frequently found in a center cockpit configuration, which typically allows for a spacious layout below decks, including two private cabins and two heads. Owners praise the boat for its exceptional livability, ample storage, and generous headroom, making it a comfortable choice for extended stays aboard. While specific headroom figures are not consistently available, the design aimed for a feeling of openness. The interior often features warm wood trim, such as teak, contributing to a classic and inviting atmosphere. The typical arrangement includes a V-berth forward, a main salon with seating and a galley, and a private aft cabin, often with its own head.

Owner's Perspectives

Owners of the Irwin 37-5 frequently laud its strengths, particularly highlighting its generous interior layout, overall livability, and significant storage capacity, which are major advantages for cruising. The boat's comfortable motion in a seaway is also often appreciated by those seeking a stable platform. However, common issues noted across the Irwin fleet, and sometimes applicable to the 37-5, include concerns about the hull-to-deck joint and a tendency for original deck fittings to develop leaks over time, necessitating re-bedding. Some Irwin vessels from the early to mid-1980s faced structural integrity questions, though this was not universally applied to all models. Despite these potential maintenance considerations, the active community of Irwin owners underscores the enduring appeal and practicality of these boats for those seeking a capable and comfortable cruiser at an accessible price point.

Measurements

Construction & Hull

Construction Material
Fiberglass (Solid)
Hull Type
Monohull Sailboat
Keel Type
Fin
Rudder
1x Skeg-Hung
Ballast
7800 lbs
Displacement
20000 lbs
Water Capacity
187 gal
Fuel Capacity
85 gal

Engine

Engine Make
Perkins
Engine Model
Engine Type
Engine HP
Engine Count
1
Drive Type
Fuel Type
Diesel
Hover over a measurement
IJPE FS LOALWL

Rig & Sails

Rig Type
Cutter
P (Main Luff)
35.5 ft
E (Main Foot)
14.5 ft
I (Foretriangle Height)
42 ft
J (Foretriangle Base)
17.5 ft
Forestay Length (est)
45.5 ft
Main Sail Area
257.38 sqft
Foretriangle Sail Area
367.5 sqft
Total Sail Area (Reported)
625 sqft
Total Sail Area (Calc)
624.88 sqft

Dimensions

LOA
37 ft
LWL
30 ft
Beam
11.5 ft
Draft
4 ft
Max Headroom
-
Air Draft
-

Calculations

Hull Speed
7.34 kn
Pounds per Inch Immersion
1