NorthCaptain
06-16-2007, 02:41 PM
Dear group,
I have a problem with my current project. It is the building of a Chatam 40 (Gilbert Caroff). The problem is that on my architect plan (Gilbert Caroff), the deck was specified to have a constant camber. A constant camber yield what we call a "cylindric deck" which is easy to lay.
A cylindric deck works well when the width of the boat is constant. In the area of the bow though, were the beam start a zero and progress wider, it creates a reverse curve in the sheer. So on my plans, the sheer line is broken at some point and i do not find this elegant. So i would love to revisit the deck camber.
I know that in order to prevent the reverse curve, one need to build a constantly changing radius camber over the lenght of the deck. This is a known mathematical problem, this web site is full of mathematical reference on this subject. But i'm not a designer, i'm a boat builder and aluminum welder !
My question to the group is the following; with a given deck, sheer and camber, does it exist automatically a developable deck of some sort or if it is possible that no solution exist ?
(here is a reproduction of the front bow and the upper chine of the boat to protect the architect's intellectual property)
If someone is ready to take on this challenge for a reasonable fee then let me know !
I have a problem with my current project. It is the building of a Chatam 40 (Gilbert Caroff). The problem is that on my architect plan (Gilbert Caroff), the deck was specified to have a constant camber. A constant camber yield what we call a "cylindric deck" which is easy to lay.
A cylindric deck works well when the width of the boat is constant. In the area of the bow though, were the beam start a zero and progress wider, it creates a reverse curve in the sheer. So on my plans, the sheer line is broken at some point and i do not find this elegant. So i would love to revisit the deck camber.
I know that in order to prevent the reverse curve, one need to build a constantly changing radius camber over the lenght of the deck. This is a known mathematical problem, this web site is full of mathematical reference on this subject. But i'm not a designer, i'm a boat builder and aluminum welder !
My question to the group is the following; with a given deck, sheer and camber, does it exist automatically a developable deck of some sort or if it is possible that no solution exist ?
(here is a reproduction of the front bow and the upper chine of the boat to protect the architect's intellectual property)
If someone is ready to take on this challenge for a reasonable fee then let me know !