MM06 - The Can engine
|Year of construction
|| 100 rpm
||heat from warm hand
Since low temperature difference Stirling engines seemed worthwhile and
challenging projects, I became excited about building the "tin can engine"
described in Dieter Viebach's book "Der Stirlingmotor einfach erklärt
und leicht gebaut" ["The Stirling engine -- A simple introduction
and straightforward designs"] (Ökobuchverlag Staufen; 2nd edition 1999;
I heeded all hints provided by the author, but the engine still proved
troublesome: Although it runs very well and smoothly if put into a cup of hot
water, it refuses to function on just the heat of my hands. I may have to rework
it once again, i.e. decrease leakage and lower friction by replacing the acetal
piston by one made of graphite and by addding a PTFE bushing to support the
displacer piston rod.
Or are my hands simply too cold? ;-)