True Round Metal Boat Building
(Made Easy)
Bezier Curve Design & Construction


Metal Boat Building

"Bezier Curve" construction enables you to build a true round design as easily as a hard or radius chine design. The beauty of Bezier Curve is that it is simple, consistent, and predictable. There is nothing vague about the method. You can see the process thoroughly by following the building of the "Bezier 12.5".

If you think you have the skills to build a hard or radius chine hull, then you have the skills to build a true round hull using "Bezier Curve Construction".

Proof of the Concept

Construction of the Bezier 12.5

See for yourself how simple & accurate "Bezier Curve" builds true round metal hulls:

Current Bezier 12.5 Pictures:


The Prototype Build

Let me say that while I have built several plywood and chine steel designs that I have no physical experience building a true round hull. The Bezier 12.5 is my first true round build.

With that said, I do know: Boat Design, Metal Fabrication, CAD-CAM, CNC Programming, and Pattern Development. Put all these things together and we come up with "Bezier Curve Chine". Why name the method "Bezier"? Because a Bezier Curve is type of freeform curve used in the design of true round hull forms. Just like "Radius" chine refers to the radius of a circle. Hence we call "Radius Chine" construction - "Radius Chine" construction. Both names relate to the geometry from which they are derived.

Again, this is my first true round build. My knowledge of line heating is limited and mote since Aluminum can not be line heated anyway. Explosive and Hydraulic forming are definitely out, and the English Wheel is not used in the construction method.

The beauty of Bezier Curve is that you can actually see and learn it within metalsailboats.com. The method is consistent and predictable. There is no force fitting of the shell plating to the framing, and nothing vague about the method. You can see the process thoroughly by following the building of the "Bezier 12.5". If you think you have the skills to build a hard or radius chine hull, then you have the skills to build a true round hull using the "Bezier Curve" method. In short the "Bezier Chine" method is simple, consistent, and predictable.

Radius Chine - Bezier Curve

"Bezier Curve" takes the concept of "Radius Chine" to the next level.

Compare the similarities and differences between "Bezier Curve" chine and "Radius Chine"

Click Blue Button

Bezier Chine in a nutshell:

  • Bezeir Curve does away with vague and obscure techniques like Line Heating, English Wheels, special tooling, fixtures, and exotic methods to achieve a true round hulls.
  • The pre-engineered design and fabrication method enables an average person to build a true round bottom hull using the same skills as required in hard chine construction.
  • Hull panels are shaped using a cold forming "Press Break" process. The method is simple, consistent, and predictable.
  • The curved sections of this hull fit together easily, with minimal adjustment onto the framework.
  • Along with Architectural drawings Bezier Curve Constdruction uses full size flat patterns and or Cad-Cam cutting files for the build.
  • The result is the unmistakable beauty of a round hull - the uninterrupted graceful line curving to meet the water.

  • Dennis Schaffer, Yacht Designer
    Telephone - 617-653-1063

    B├ęzier Curve DESIGN
    (The next logical step)

    Bezier Building Plans

    Complete True Round Hull construction plans using "Bezier Curve" Design are now available - Click any of the three links below for Details.


    Bezier 12.5 Plans
    Aluminum Construction

    Bezier 35 Plans
    Steel Construction

    Bezier 28 Plans
    Aluminum Construction