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Very nice find! I got one from my dad after he passed away a few years ago. It's in decent shape. Not sure if I want to do anything with it or leave it as is. I've run it a couple of times and it runs good, not to sure if I can trust the glass tube on the boiler Mark

Wow! Very nice! :big: Welcome Mark

Oh Man! Now something else I gotta make Mark

Absolutely beautiful work Steve! That's going on my "gotta make" list

Carl, I got a 5C chuck for my lathe from CDCO. I checked and it's still $139. You'll need an adapter to bolt it on your lathe, but that's only about $30. The chuck is really nice, runs very true. Once you use collets, you'll never want to use a jawed chuck again ;D Mark

:big: Congrats Rick! Mark

Congrats Stew! Enjoy :big: Mark

What RPM can you get? The best thing that happened was that I burned up the moter on my Micro Mill. That forced me to do a belt drive (I made my own) and now I have up to 9000 RPM :big: For what most of us do here the increase in RPM really helps Mark

Finally got the flywheel done. It runs pretty good, but is an air hog. Still leaks between the cylinders and mounting points. I'll try tuning it a little more, but I'm pretty much done with this one. I want to do one with a longer stroke and experiment with different materials so stay tuned. It...

Congrats! :big:

WOW! Very nice! Mark

Yeah, I used to have an Amazon parrot. He could puncture you faster than you'd think! Mark

1Kenny, thanks for the tip. I hadn't thought about the center axis maybe not being coplanar; will check it. Blogs, thanks for your thoughts too. I have it running down to about 12-15 PSI without a flywheel, so I think I'm pretty close. The cylinder is leaking only one side so I think it's axis...

An update and a little more learning on my part here. I had pulled it apart to add the counterbores on the baseplate for the orings. I had labeled the pistons and cylinders so I could get everything back the same way. Good enough? No. I put it back together and it just wouldn't run at anything...

Does anyone see any problem with my drawing up a complete set of plans, incorporating the changes I've made and posting them here? I, of course won't present it as my own design, I'd just like to redimension and clarify a few things Mark

The rest of the parts can be made as on the plans (with a couple of possible exceptions, mentioned later) as long as care is taken in certain areas. The upright (flywheel post on the plans) needs to have the valve side surface and side that mounts to the base exactly perpendicular, likewise the...

If that works better for people, then that's the correct way ;D

Two more drawings Added an "as bent" view for the piston. Drew up the base plate and dimensioned it better (I think) and added counterbores for o'rings to seal the upright and valve port block as I'm having some leaks there Mark

Kvom, thanks for the karma point! :big: I'm sure you could use an edgefinder instead of a DTI, i think it would be faster with a DTI tho. mnbylcr2, the valve porting is built into the vertical piece. Not sure why it has one on the base but not on the vertical. Mark

Bill, I didn't anneal it at all, it bent quite easily. I will make a flywheel for it but it has some air leaks that I want to fix first Mark