True Round
Metal Boat Building



The development of 'Bezier Design and Construction' is a result of my career in Architectural Metal Fabrication, CNC Programming, Sheetmetal pattern Development, and my studies at the 'Westlawn Institute of Marine Technology.

The metal True Round boat Building method that I am about to introduce, 'Bezier Chine Design and Construction', was developed entirely by the author.  It is a design  is a high-tech computer design method that blends well with the proven time-honored sheet-metal fabrication layout method know as 'Approximate Development', and is the backbone of 'Bezier Design and Construction'.  There are No Artistic, Vague, or Obscure  True Round metal boat building methods addressed.

All the components of the hull and deck structure are pre-engineered the entire hull structure, including the shell plating  are predefined to fit seamlessly together. 

Approximate Development

You may also find these other aspects of 'Bezier Design and Construction' on the Right Column - Interesting:

Check out the CatsPaw Dinghy - An entry level True Round Bezier design - Get Your feet wet and become a True Round metal boat builder.

The classic Day-sailor, Lighting Strike' designed to be constructed in both Steel and Aluminum - Why the weight of a displacement hull is is not the determing factor for the hulls speed, but the Length of the waterline. Followed by a Race between them via Velocity Prediction Software.

See a race between a double hard Chined redesigned to a true round hull (Yes it is possible) followed by a race between them via Velocity Predictions Software, sheeding light onto the long ask question. Is a true round hull faster than a Hard Chined hull?

Layout and fabricate of custom Hatches, Port Lights, and more.

The advances in the 'English Wheeling' method for forming True Round Shell Plating.




Prototype Build

(The Bezier 12.5)

If this curvy classic aluminum design can be built using 'Bezier Design and Construction', then any other true round hull shape would certainly be a breeze.



Click on the below link (Hull Components) to see a preview of the Transverse Frames, Longintudinal Frames, and Shell Plate fabrication or (Building  the Hull) for  an overview  of how the Hull is fabricated.

Hull Components

Building the Hull




Traditionally, True Round Metal Hulls have been built using the 'English Wheel', however becoming proficient in the use of the 'English Wheel' for the building of a single True Round metal hull would require a Special kind of person.

There have been advance in 'English Wheeling', that many are not aware of that taken  the mystic out of the process of 'English Wheeling'. 

I therefore include those advances here. 

English Wheeling



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2009 - 2025




New - Ongoing

The redesign of the classic sailboat Dark Harbor for Aluminum construction

Updated - June 22 2025

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Go to Dark Harbor Redesign



New to Steel and Aluminum True Round Boatbuilding

The Catspaw Dinghy

Click Here


Steel and Aluminum True Round Plans

Click Here


"Lighting Strike'

Why weight does not the sole factor in determining the speed of a Displacement hull.

Go to Lighting Strike's Velocity Predictions


How to layout and fabricate Hull Intergrals

Fabricating Hull Intergrals such as a Hatch Coaming is the next stage of boat construction.

The below pics is an initial dimensioned hand sketch - The first step in the layout process.


Click here to continue the process.


English Wheeling

This is not your Father's 'English Wheeling' method.

See how the 'True Round' shell plating is reduced to a flat patternsthat take the mystic out of the English Wheeling process.


Click Here for Details



Which type of hull is faster - A True Round design or Hard Chine design? See which via the results of 'Velocity Prediction' software.

Click Here

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The top pic is the orginal design - The bottom pic is the converted True Round version.

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