Designer Articles

Approximating Displacement for Canoes and Kayaks

On January 23, 2018, in Designer Articles, Human Powered, by Glen L. Witt
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A common question is “how much weight will she hold?” This especially applies to smaller boats such as canoes or kayaks. The following will give a rough idea of the displacement of a typical double ended craft such as a kayak or canoe. It will not be accurate with boats that have a transom. The […]

Comparative Weights of Plywood, Aluminum and Steel

On September 14, 2017, in Aluminum Construction, Designer Articles, Plywood Construction, Steel Construction, by Glen L. Witt
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We are frequently asked if a design can be built in some other material than that noted. Any of our plans intended for planking with sheet material are designed to be a segment of a cylinder or a cone called “conendric” development. This usually means sections of the hull will be straight lines or convex. […]

Buoyancy and How To Balance Your Hull

On September 13, 2017, in Designer Articles, by Ken Hankinson
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In a recent “Build Your Dream Boat” email, we introduced the principle of buoyancy and how any floating object pushes aside, or displaces, an amount or volume of water that’s EXACTLY the weight of the floating body. This all-up weight of the floating body we call displacement. In the following, we’ll extend our discussion on […]

Buttocks, Waterlines and Diagonals

On June 7, 2017, in Designer Articles, by Glen L. Witt
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This discussion primarily applies to vee bottom boats, although the terminology is similar to those with a round bilge. The terms buttocks (butt), waterlines (wl), and diagonals (diag) are referred to on the “Lines Drawing” of a set of plans which is usually on sheet 2. Unless the boat is being lofted, they will have […]

Why Fiberglass A Boat?

On May 28, 2015, in Designer Articles, WebLetters, by Gayle Brantuk
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The following article is excerpted from our book, “How to Fiberglass a Boat”.   It may seem self-evident why one should want to cover a boat with fiberglass. But the surprising thing is that many people do not realize the REAL reasons. Some just assume that it’s the thing to do because they’ve seen it […]

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