Irwin 33 Mk II Information, Review, Specs

Boat drawing
Make
Irwin
Model
33 Mk II
Number Built
Production Year(s)
1976 - ??

The Irwin 33 Mk II is a masthead sloop designed by the prolific Ted Irwin and built by Irwin Yachts, commencing production in 1976. This model embodies the builder's dual philosophy of creating both capable performance vessels and comfortable family cruisers. Positioned as a moderate-weight sailboat, the Irwin 33 Mk II is often regarded as a stable and stiff vessel with good righting capabilities, making it a reliable choice for coastal cruising and even some club racing. Its design reflects Ted Irwin's commitment to delivering practical and livable boats that appeal to a broad spectrum of sailing enthusiasts.

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History and Design

The story of the Irwin 33 Mk II begins in 1976, marking its introduction during a period of significant productivity for Irwin Yachts. Ted Irwin, a designer known for his passion for boat building since his teenage years, established Irwin Yacht and Marine Corporation in St. Petersburg, Florida, in 1966. The company quickly became a prominent producer of fiberglass sailboats, a construction material that was standard in the industry during its operational years. Irwin's design philosophy was diverse, catering to both the competitive racing circuit and the burgeoning cruising market. The Irwin 33 Mk II, specifically, saw some models actively raced at the IOR 3/4 ton level, highlighting its performance aspirations within a comfortable cruising platform. While detailed variations between a potential "Mk I" and the "Mk II" are not extensively documented in available public records, the "Mk II" designation typically signifies refinements and improvements over an earlier version of the design. During its production run, the Irwin 33 Mk II was offered with various keel options, including a fin keel known for its maneuverability, and a shoal draft option, sometimes with a keel/centerboard configuration, allowing access to shallower waters.

Sailing Performance and Handling

The Irwin 33 Mk II exhibits a sailing profile that balances moderate performance with commendable stability. With a Sail Area to Displacement ratio of approximately 15.03, she is considered a moderately powered vessel, performing best in moderate to heavy air rather than excelling in light-wind conditions. Her Ballast to Displacement ratio, around 0.351, contributes to a solid righting moment, which is notably higher than many comparable sailboat designs, indicating a stable and stiff hull that can stand up to a good breeze.

The Displacement to Length ratio of approximately 256.5 places the Irwin 33 Mk II in the lighter end of mid-displacement cruisers. This suggests a boat that offers a reasonable turn of speed without sacrificing the comfort and carrying capacity expected of a cruiser. When equipped with a fin keel, the Irwin 33 Mk II provides splendid maneuverability, although this might come with a slight trade-off in directional stability compared to other keel types. The availability of a centerboard option further enhances its versatility, allowing sailors to navigate both deeper coastal waters and shallower inland areas. Overall, the Irwin 33 Mk II is generally described as a stable and predictable boat, offering a secure and comfortable motion in various sea states, a characteristic valued by both cruising families and those undertaking longer passages.

Accommodations and Layout

While specific detailed interior layouts for every Irwin 33 Mk II may vary and comprehensive descriptions are not widely available, Irwin Yachts was generally known for designing practical and livable boats for cruising and liveaboard lifestyles. This often translated into interiors that maximized space and comfort within the given hull dimensions. Typically, boats of this size and era would feature a conventional layout including a V-berth forward, a main salon with settees that convert into berths, a galley, and a head. Given Irwin's focus on cruising, it is reasonable to infer that the 33 Mk II would offer adequate storage and ventilation for its size. The fiberglass hull construction would typically be complemented by wood trim and cabinetry, providing a warm and traditional aesthetic common in sailboats of the 1970s.

Owner's Perspectives

Irwin Yachts has historically fostered an active community of owners, with dedicated online groups and forums where enthusiasts share their experiences and advice. While specific, synthesized owner reviews for the Irwin 33 Mk II are not extensively detailed in general public searches, the enduring appeal of Irwin boats often stems from their reputation for solid construction and their ability to provide comfortable cruising platforms at accessible price points. Some general anecdotal references suggest a focus on interior volume, earning some Irwin models the affectionate, if informal, moniker of "Party Barge," hinting at their capacity for onboard living and entertaining. The longevity of these vessels and the continued loyalty of their owners are testaments to Ted Irwin's vision for creating reliable and well-designed cruising sailboats.

Measurements

Construction & Hull

Construction Material
Fiberglass (Solid)
Hull Type
Monohull Sailboat
Keel Type
Fin
Rudder
1x Spade
Ballast
4200 lbs
Displacement
11950 lbs
Water Capacity
-
Fuel Capacity
-

Engine

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

Rig & Sails

Rig Type
Masthead Sloop
P (Main Luff)
35.5 ft
E (Main Foot)
11 ft
I (Foretriangle Height)
42 ft
J (Foretriangle Base)
14 ft
Forestay Length (est)
44.27 ft
Main Sail Area
195.25 sqft
Foretriangle Sail Area
294 sqft
Total Sail Area (Reported)
489 sqft
Total Sail Area (Calc)
489.25 sqft

Dimensions

LOA
33 ft
LWL
27.5 ft
Beam
11.17 ft
Draft
5.5 ft
Max Headroom
-
Air Draft
46.25 ft

Calculations

Hull Speed
7.03 kn
Pounds per Inch Immersion
1