Scotch All Round

[PaulR]

After a bit of running in, tootles along at about 15psi (still haven't straightened up that right-hand support!):
<a href="https://www.youtube.com/watch?v=Iqgz5H8rUaM" target="_blank">http://www.youtube.com/watch?v=Iqgz5H8rUaM</a>

[Kim]

Wonderful!  It just puffs right along, doesn't it! 

Kim

[PaulR]

Wonderful!  It just puffs right along, doesn't it! 

Kim

Thanks Kim. I think the lack of a gland nut is making a real difference: if I put a drop of oil on the piston rods near the cylinders there's a sudden increase in speed, presumably as the oil is forming a seal. Ho hum, I live and learn! On to the next project, starting in the next day or so.

[redhouseluv]

Nice one Paul, great little runner

It'l be great to see what your next mission is .......should you wish to accept it 

[PaulR]

It'l be great to see what your next mission is .......should you wish to accept it 

Hehe, new post on the topic coming right up!

[PaulR]

As promised in post #4, here's the plan for this engine. It's not complete by any means and some small changes were made later in the build but none of the essential dimensions changed. Proper CAD conventions have not been observed so sorry if it's a bit unclear or ambiguous in places.