'True Round Metal Boat Design'



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'Bezier Chine' is a High-Tech Design – Low--Tech Construction process that enables ‘Metal Boat Builders’ to fabricate true round metal sailboat hulls as easily as a hard chine design.

‘Bezier Chine’ design is based on a computer enhanced application of 'Approximate Development'. A sheet-metal layout method, dating back to a much earlier time, used to develop 'Warp' or 'Compound' architectural surfaces onto a 'Single Plane'.

My first book 'True Round Metal Boat Building' began with the theory of ‘Approximate Development’ takes the mystery out of Bezier Chine. I did not Father ‘Approximate Development’. I did however successfully apply ‘Approximate Development’ to the ultimate ‘Warped’ or ‘Compound’ surface - A Sailboat Hull. In this book 'True Round Metal Boat Design' I am going to share my Design knowledge with you.

‘True Round Metal Boat Design’ will cover the idiosyncrasies specifically related to metal boat design and construction.



Contents

Introduction:                                                        

Surface Design Concepts:                                    

The Model File:                                                     

Profiling Transverse Frames:                              

Defining Transverse Frames:                             

Creating Longitudinal Frames:                            

Defining Longitudinal Frames:                             

Plating Developable Surfaces:                            

Defining True Round Shell Plating:                    

Plating & Longitudinal Crossings:                       

Alternate Longitudinal Placement:                     

Redesigning The Bezier 12.5:                             

Master Curves Dimensions:             

     




New - Ongoing

The redesign of the classic sailboat Dark Harbor for Aluminum construction

Updated - June 22 2025

dark-harbor-model-file.jpg

Go to Dark Harbor Redesign



Steel and Aluminum True Round Plans

Click Here for Plans


Demystifying the weight factor

By way of a VPP Race between two versions of 'Lighting Strike' (One steel and the other Aluminum)

The weight factor Demystifed

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 platting is reduced to a flat pattern. These Flat Patterns take the mystic out of English Wheeling.


Click Here for Details



Converting an existing Hard Chine Design to a True Round Design

Followed by a Race via a 'Velocity Prediction Program.

Click Here

conversion1.jpg

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

conversion2.jpg