Minimum radius bend in 3mm ply

[oddboatout]

does anyone know what the minimum radius bend I could make in 3mm ply. Is a 12 inch R hoping for too much. I know that plywood grade and material comes into play but for this question just assume that all marine ply is the same.

Thank you,

 

[Mike Graham]

Species and grade affect even the order of magnitude for minimum bend radius.

A 12 inch bend is not very tight for 3mm plywood, especially not across the grain. It shouldn't be a problem at all from what you've said.

Most plywood hulls I've seen don't contain radii anywhere near this small. What feature is this for? A soft chine?

 

[El_Guero]

Look at post #4 http://www.boatdesign.net/forums/materials/force-required-bend-plywood-panels-47944.html

Steam, or at least use boiled towels ....

Wayne

 

[PAR]

3 mm plywood, regardless of species or fiber orientation will make a 12" radius.

 

[oddboatout]

I am working on a better one sheet design and a 12 inch radius would be great.

Thank you.

 

[messabout]

A one sheet boat with 12 inch radii? That is going to be an interesting boat. Please tell us more.