bending an aluminum header

[Bob Richards]

A friend of mine, who has a background in metallurgy, used to bend aluminum tubes and pipes by filling with water, freeze, then bend. IIRC, he said the cold made it bend easier, and the ice inside would prevent kinking. But, my memory aint what it used to be. :-)
 
Bob R.


Michael Ramsey <michaelr at modelaircraft.org> wrote:
If you're worried about kinking, consider filling up the header with a
fine grain sand and plugging both ends of the header before bending.
Instead of a dowel, use a pipe over the header to leverage the end of
the header into the position you want after evenly heating the header.

Michael Ramsey 

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