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Calculating Metal Bend Allowance

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Well-Known Member
Sep 13, 2006
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Here is a site that will help you calculate the allowance for bends in metal.

Randy has stated that there is a chart in the Tony Bengelis books, and I'm sure it works well. Randy has built 3 planes, so he should know.

However, if you are a Type A kinda person like me who needs exact calculations, this site will help you.


If you don't undertand Randy's advice and don't understand the listed site, please pull $20 outta your cheap butt and buy access to the builders manual.

Thank you. :)

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