robcas631
Well-Known Member
For a small stationary steam engine. In order to create the piston "rings" should I use leather? or Cast Iron? If I use leather? Which leather is best and how do you cut it to fit?? Thanks
Most of Elmers engines have these grooves on them. I may need to remake some oiston for an air/steam engine and was wondering if they would work on a 18mm bore? They worked on my wobbler.Rocket Man said:I wish I could remember the name of these grooves. Some small engines use tiny grooves as rings it produces pressure changes along the side of the piston and it works like rings. The grooves are about .030" wide and .030" deep .125" apart the full length of the piston. My physics professor told me about this many years ago, I looked it up and sure enough it says the groove produce pressure changes along the piston that act like piston rings, used on very sensitive equipment were ring friction can not be tolorated. I tried it on one of my stirling engines and it does seem to run better.
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