W22 Sailing Trimaran


For more descriptive information on the W22, CLICK on one of the links below…

Design Characteristics of the new W22
Background on W22 Design (book article)
Latest on the W22 — January News
April 1, 2018

Study Profile of the W22 Sailing Trimaran

The first W22 is now complete and hull Plans with a detailed Build Manual are now available. (Write to me for purchasing details if not attached).

As mentioned in earlier bulletins, the W22 was designed to fall in the slot between the totally open cockpit boat (like the W17 and M23) and the full cabin boats (such as the L7, F22 and Scarab 22). By selecting this niche, the boat will offer more cockpit space than the cabin boats, yet still have overnight camp-style accommodation under a closable cuddy, with the option of fully enclosing the large cockpit with a tent for dining inside under full protection, for family and friends. By keeping the boat interior as simple as possible and using a proven and easy-to-use demountable system for the amas, the boat can be as light as boats of more complex hi-tech construction, yet be less expensive and easier to build, with potentially even better performance, aided by greater beam and higher volume amas.

As for all my designs, this boat will offer above average comfort, performance and dryness and was created to give an excellent return-on- investment. The relatively simple construction system has some unique twists and combines the best of two worlds with a rounded underwater section and spray-deflecting knuckle, with fast-to-assemble plywood** panels for the topside, all sheathed for long life. All the stations and bulkheads are now available on *.dxf files for printing out full size or CNC cutting and ply panels have developed offsets for easy fitting.

** (there’s always the option to replace plywood with foam-cored panels, though this increases material cost of the hulls. The first boat was foam- cored though.

As I said when introducing the W17, many sailors are intrigued or already bitten by the multihull bug, but not everyone is ready to put thousands of hours into building, or high dollars into buying boats now on the market. So for those looking for something really neat looking that will perform very well in all conditions AND also be affordable, the W22 could be your answer. Below are her specs. and outlines.

With all my designs, I am personally looking for “Overall Performance” and by that I mean a sweet blend of attributes that makes my boats a pleasure to own and sail. First of all, I want them to ‘feel right’ and perform efficiently. I also want them to be cost- effective, comfortable and drier than their competitors, and finally, provide the deep sailing satisfaction that brings their owner home with a big smile.

There is something extremely satisfying about building your own boat as many in the past have learned. But there are not many new designs out there that still use familiar material like strip cedar and marine plywood that's available almost the world over. Its combination with epoxy and glass now goes a long way to prolonging its life too if used and ventilated as recommended. As for the W17, the W22 is designed with a rotating wing mast in mind. In the case of the W22, this will be an efficient wingmast of carbon fiber that can be uniquely built as a one-off, for a fraction of the cost of a professional CF mast. A detailed manual for this mast is now available and three such masts have already been successfully built.

With space for 4-5 to daysail or for enjoying some fast sailing for 2-3, this boat will change the way you think about sailing for ever. She is unapologetically based on my 16 years of experience with “Magic Hempel” and even though I’d already sailed for 45 years when I bought that boat, that boat changed my enjoyment of sailing in a major way and inspired the W22, even after she was sold.

I was finally able to get over to Europe to test sail the first W22 recently, and she will be everything that I’ve promised above. Unfortunately the weather was mostly with a gentle breeze though we had one early day with a few gusts to show us the promise of what’s to come .... readily reaching 12kts with minimal effort. The owner had already reported he was totally delighted with the performance, touching 8kts in 8kts of wind and remarked on, ‘the quiet smoothness through the water, good acceleration and responsive handling’ with the twin rudders. Numerous Build Articles have already been posted on my website and more will follow as I strive to find time to now write them.

Attached are some drawings and photographs ... with the sailing shots taken only recently (March 2017) while in Portugal.

Plans as available are only US$420 (now back to US$350 again with on-line file transfer that saves high mailing cost) .....

Write for pre-purchase agreement to trimarandesign@earthlink.net.    The purchasing procedure will then be sent to you.

CLICK HERE to download and save or print this Study Profile in PDF-format.
Note:  Plan cost on this Print-Out is from 2015.  .
Displacement at DWL: 1900 lbs
Buoyancy of Ama: 1700 lbs
Estimated weight: 500-650kg
  (~1100 to 1400 lbs - all foam, to all wood)
Estimated construction time: 800 hrs
Estimated cost of materials: $16,000–$20,000
  depending on source and quality
Designed by: mike waters n.a.
LOA: 6.74 m (22'-1")
LWL: 6.7 m (22'-0")
Beam sailing: 5.49 m (18'-0")
Beam folded: <2.25 m (7'-4")
Main: 20.4 m² (220 ft²)
Jib: 10.2 m² (110 ft²)
Total upwind: 30.7 m² (330 ft²)
Reacher/drifter: 20.4 m² (220 ft²)
Spinnaker: 30 m² (320 ft²)
W22 Sail Plan



W22 Lower Main Hull shown above
- built with glass covered strips, using foam, balsa or cedar -
For more construction pics., see Building the W22

W22 view

Note the fast and elegant form achievable with a combination of strip construction and flat topside panels

W22 view

Day sailing on a trimaran like this is greatly enhanced with the large, comfortable trampolines that offer a huge deck area, yet are still light in weight.

W22 view

The molded, lower part of the main hull will be built on a simple building frame, using computer-generated faired sections and cedar strips, all epoxy sheathed.

Description Quantity (main items only)
Plywood 4' x 8' (1.22 m x 2.44 m) x 6 mm 22 sheets
Strip Cedar ¾" × 38" 2200 lineal ft
Plywood 4' x 8' (1.22 m x 2.44 m) x 4 mm 5 sheets
Spruce/Pine/Cedar (stringers) 60 bd-ft (0.3 m³)
Hardwood - mahogany 10 bd-ft (0.03 m³)
Epoxy resin & hardener, fillers 10 gallons - depending on sheathing
Fibreglass cloth (6-oz) 200 sq-yd - depending on sheathing
Fibreglass - 45/45 Bias and Unidirectional cloth  200 sq-yd
Paint - Varnish to finish 6 gallons
W22 - 01 Sail Plan
W22 - 02 Profile Views
W22 - 03 Sections
W22 - 04 Side ply offsets
W22 - 05 CB case & forebeam boxes


Cuddy and cockpit - customized to suit each owner


Heading out into the Mediterranean


Easy tacking with double rudders and momentum maintained


Lifting rudders & centerboard permit safe sailing off the beach


7 knots over ground against the current


‘Markiza’ in Portugal 2017

Study Profile
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