Compound curve advice
Posted: Sat Jun 13, 2020 9:06 am
Hello,
I'm new to this forum, I'm also new to aluminium boat construction despite being a professional boatbuilder for over 20 years my training and field has always been within wooden boats, so as far as your community goes I'm both a newbie..... and not.
I'm hoping to get a little advice if possible with relation to a hull I have been developing. Ordinarily In my world this type of hull would be cold moulded/plywood construction to produce a monocoque form. The process of laminating the many planks would allow compound curves to be formed and at times the use of pulling flat plywood sheets into place would also allow compound curves. If you take the smaller Riva/Chriscraft type boats they have both bottoms and decks made from flat sheets of plywood that are compound curved forms that have been pulled into place (under quite some stress) by fastenings and glue whilst having cold moulded topsides which are made with very little stress though time consuming.
I'm exploring the option of constructing a hull similar to the one described above but using aluminium instead of timber. I am of the belief (correct me if I'm wrong) that aluminium boats of this size are generally constructed in flat planes rather than compound curves for the obvious reason of simplicity. The compound curves however are important to my design and I would like to find the best way of forming them correctly.
To illustrate the requirements for a bow section an approximation would be a 5m radius curve (waterline) with a flair curve of 2m radius (body mould section) currently planning to be working with 4mm 5083. If any one has any advice from in house solutions to specialist forming options I would be grateful for your insight.
If you are interested to find out about my background:
www.johnmcshea.co.uk
www.devoncraftsman.com
www.instagram/johnjmcshea
Thanks in advance for any replies,
John.
I'm new to this forum, I'm also new to aluminium boat construction despite being a professional boatbuilder for over 20 years my training and field has always been within wooden boats, so as far as your community goes I'm both a newbie..... and not.
I'm hoping to get a little advice if possible with relation to a hull I have been developing. Ordinarily In my world this type of hull would be cold moulded/plywood construction to produce a monocoque form. The process of laminating the many planks would allow compound curves to be formed and at times the use of pulling flat plywood sheets into place would also allow compound curves. If you take the smaller Riva/Chriscraft type boats they have both bottoms and decks made from flat sheets of plywood that are compound curved forms that have been pulled into place (under quite some stress) by fastenings and glue whilst having cold moulded topsides which are made with very little stress though time consuming.
I'm exploring the option of constructing a hull similar to the one described above but using aluminium instead of timber. I am of the belief (correct me if I'm wrong) that aluminium boats of this size are generally constructed in flat planes rather than compound curves for the obvious reason of simplicity. The compound curves however are important to my design and I would like to find the best way of forming them correctly.
To illustrate the requirements for a bow section an approximation would be a 5m radius curve (waterline) with a flair curve of 2m radius (body mould section) currently planning to be working with 4mm 5083. If any one has any advice from in house solutions to specialist forming options I would be grateful for your insight.
If you are interested to find out about my background:
www.johnmcshea.co.uk
www.devoncraftsman.com
www.instagram/johnjmcshea
Thanks in advance for any replies,
John.