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Intro Part 3—W17 Trimaran Build Manual & Plans

For additional descriptive information on the W17, CLICK on one of the links below.

Preliminary Design Concept & Development
Review of W17 Hull Forms
Intro Part 1—The W17 Design
Intro Part 2—Building the W17
W17 Study Profile
Order Plans
March 01, 2010, updated January 1, 2013

Here is the final Part 3 of intro articles on the new W17 Estuary Trimaran by naval architect Mike Waters. Designed to be homebuilt from plywood with epoxy/glass reinforcement, here is a rundown on what to expect from the plans.

First, here is a list of the 15-sheet package with their short title. Often, other parts are detailed on these sheets though not identified in the title given below. Dimensions are given principally in metric, though most scantlings (material sizes) are also given in imperial. Once you accept to adapt, you'll find metric is far easier to work with and 1 mm is a fine figure to measure to, being somewhat smaller than 116".

W17-01  Sail Plan
W17-02  Main Hull
W17-03  Main stempiece
W17-04  Deck structures
W17-05  Amas
W17-06  Ama stempiece (full size)
W17-07  Building Platform
W17-08  Daggerboard Case
W17-09  Deck Plan
W17-10  Aft Beam (aka)
W17-11  Forward Beam
W17-12  Curved beam ends
W17-13  Daggerboard, rudder etc.
W17-14  Spade rudder (full size)
W17-15  Fwd, beam fairing

CDThe plans themselves are available in PDF file format for home printing, but are also available in hard copy for those far from a Print Shop (such as Staples etc) that can print out the PDF files in large format.

Complete with the detailed BUILD MANUAL, they are now available on a data CD like this.

Each sheet is 24" x 16" and all are accompanied by an extensively detailed Build Manual that not only explains how to prepare all the parts and best assemble them, but also gives tips and details on bonding and sheathing for best results and low weight.

The sample below is only a low definition image from one of the 15 sheets. The PDF images will be much better defined, of course.


A bonus with these plans, are detailed nesting sheets that show how the parts are to be cut from the various sheets of plywood in order to have minimum waste. Many designers leave that up to the builder and it can waste Sample Nesting a lot of time figuring all this out. Here is a sample of one such sheet. The actual sheets will be much clearer than the reduced image shown here. [Click on the image to open a larger view.]

The Build Manual takes the builder through each task, explaining the preferred order of work and adding helpful hints along the way. Scarfing, bonding and sheathing are all addressed and many sketches, such as the one shown here, added to illustrate the 106-page text of the updated and expanded Jan 2013 Edition of the manual, which now includes over 160 sketches and photos.

Aft Hinge

Overall, we think this makes a most attractive package as far as today's plans are concerned.

There are not many new designs out there that use light and readily available plywood yet succeed to combine it in a manner that still creates an attractive looking boat that will perform very well and not take an eternity (or new, specialized skills) to complete. Sheathing in epoxy and glass will give the boat a useful life span, especially with covered storage. Should registered owners (you're 'registered' as soon as you buy the plans) have any questions during the construction, they will typically be able to get these answered within 48 hours (generally less), through an email address to be provided at time of purchase.

The other point of interest to many is that the boat is designed to carry an interesting wing mast that can also be built at home. Wing mast designs are not so easy to come by and often sell for more than the cost of this complete set of plans. Although this mast design will be sold as a separate item later on, we will make it available FREE for registered builders of the W17, if they agree to share pictures of their own W17 under construction—once at least half finished.

The boat is also versatile in what it can do and where it can sail. It has enough space for cruising with 2, sailing with 3 up and has enough ama buoyancy to even fly the main hull when more lightly loaded, if that's your thrill. So this is a boat that will be exciting to sail and own, and prove to be a constant conversation piece, especially with its curved akas and wing mast. You just have to get started if you want to soon be part of the action.

Build Manual

Deck PlanSection Plan
Click on one of the above images for a larger view

CLICK here to order plans

As the designer has no control over final material used, quality of construction or conditions of final use, all Plan Purchasers will be asked to acknowledge a standard waiver, accepting personal responsibility for their own work, acknowledging that they build and sail this small boat entirely at their own risk.

Let me know if you have any questions that need to be addressed now.

Enjoy !… and feel free to send in specific questions via my Questions Form, that I may select to answer through this webpage if considered of broad interest.

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