Graphite piston for Elmer's no11 engine

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lensman57

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Hi everybody,

I am about to start the build of a 3 cylinder radial air engine based on Elmer's no11 design. I will machine the cylinders out of 1.25" brass rod as the square design of Elmer's does not appeal to me. I was thinking of using carbon graphite filled ptfe rod for piston mainly to reduce friction. I have a little stock of this material and was wondering if this was more suitable than either 2014 or 6082 Aluminium for this purpose. I was also wondering if the pistons required rings or a plain one as per Elmer's design would suffice.

Many thanks for your input,

Regards,

A.G

P.S I mistakenly posted this question while I was in the finished projects section, so here is my apology.
 

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