Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Thanks Again for the catalog scans Gil.

So today I continued on with trying to get this thing to run.  No matter what, it seemed like air was going every where but to the cylinder.  I had pretty much disassembled, checked everything, reassembled, adjusted, hooked up air, tested, remade parts etc.  The one thing I didn't remove was the cylinder lagging.  So today I did.

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I don't think you should be able to see the piston going back and forth through the 3 big holes in the wall of the cylinder where who ever made this thing bored it out to big!  And I don't know how I missed this big of a hole when I inspected the bore.  I guess I only looked at the bottom and side where the port was cored in.

So I have a cylinder sleeve to make and fit.  Right now the piston mic's out at 1.255.  The cylinder bore is 1.262.  I don't think I am capable of making a sleeve that is .012 to bring the cylinder down to exactly 1.250 (.006" walls).  So I am thinking I will drop the cylinder bore down to 1.125" with a sleeve, and turn the piston down to match. 

I do not have any cast iron that is big enough to make the cylinder from.  I do have some 12L14 leaded steel that I can use, or some brass that I could use.  Do you think either of those would be suitable, or should I buy a chunk of 1.5" cast Iron DuraBar? 

This one is going on the back burner for a while.

Jim in Minnesota

This is really bad luck - nobody really expects that
I already made a sleeve for a cylinder - best material is bronze
and it is easy to turn and hone - you can use 603 Loctite to seat it.
undersized 1/10 mm should work. I think you can get a bronze bar/pipe in the US.
Arnold