IRWIN 31

Main

Appendages
Keel/Cbrd.
Construction
FG w/balsa cored deck
First built hull
1968
Hull type
Monohull
Model
Atomic 4
Sailboat builder
Irwin Yachts
Sailboat designer
Ted Irwin

Dimensions

Ballast Type
Lead
Ballast weight
1724.0
Beam
2.92
Displacement
4354.0
Draft
2.29
Max Draft
2.29
Min Draft
1.01
Overall length
9.47
Waterline length
6.78

Sails

E
4.27
Est. Forestay Length
11.87
Fore area
20.8
I
11.28
J
3.69
Mainsail area
20.81
P
9.75
Total area
41.62

Engine

Engine(s) power
25.0
Engines amount
1
Fuel tank capacity
95.0
Fuel type
Gas
Make
Universal

Performance

Ballast ratio
39.58
Capsize Screening Formula
1.81
Comfort Ratio
29.37
Critical hull speed
6.32
Displacement-length ratio (DLR)
389.07
Upwind sail area to displacement
15.92

Accomodation

Freshwater tank capacity
189
The IRWIN 31 is a popular sailing boat that was manufactured by the American company, Irwin Yachts, in the 1970s and 1980s. It is a mid-sized cruising sailboat known for its comfortable and spacious interior, as well as its good sailing performance.

Here are some key features and specifications of the IRWIN 31:

1. Design: The IRWIN 31 was designed by Ted Irwin, who aimed to create a boat that offered both comfort and performance. It has a sleek and classic design with a moderate displacement hull.

2. Dimensions: The boat has an overall length of 31 feet (9.45 meters) and a beam (width) of 10 feet (3.05 meters). It typically has a draft (depth) of around 4.5 feet (1.37 meters), making it suitable for coastal cruising.

3. Interior: The IRWIN 31 has a spacious and well-designed interior layout. It usually features a V-berth cabin in the bow, a main saloon with a dinette that converts into a double berth, a fully equipped galley, a head (bathroom), and a quarter berth. The interior is known for its ample storage space and comfortable living areas.

4. Sailing Performance: The IRWIN 31 is considered a good performer under sail. It has a moderate sail area and a fin keel, which provides stability and helps with maneuverability. The boat is known for its ability to handle various weather conditions and sail comfortably in both light and heavy winds.

5. Construction: The IRWIN 31 was built using a solid fiberglass hull, which is known for its durability and strength. The deck is typically made of fiberglass as well, with a non-skid surface for safety. The boat is generally well-built and has a reputation for being sturdy and reliable.

6. Rigging: The IRWIN 31 usually features a masthead sloop rig, with a single mast and a mainsail. It also has a roller furling headsail, which makes it easier to handle and adjust the sail area while underway.

7. Accommodations: The boat can comfortably accommodate a small family or a group of friends for overnight trips or extended cruising. The interior offers enough headroom for most people to stand upright, and the layout provides privacy and comfort for extended stays on board.

Overall, the IRWIN 31 is a well-regarded sailing boat that offers a good balance between comfort and performance. It is suitable for coastal cruising and can provide an enjoyable sailing experience for both experienced sailors and those new to the sport.

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