I have now installed all the eccentric parts after a lot of work introducing all the tolerances to get everything moving smoothly ....all the drawings are in Imperial fractions and all cheating parts are of the same dimension ??!!! as we all know that a 1inch shaft will not enter a 1 inch hole so there has to be a certain tolerance    so you have to decide which part is smaller or larger   and this is where the fitter comes in .  I have also been stamping numbers and centre pops on all the parts so that they all go together correctly  afterpinting and polishing     I also have some old rules that are engraved with separate scales of  1/8th  1/16th   1/32 and1/64th  this makes measurements in those fractions easier to see...rather then all the measurements crammed together.

Someone had complained about the old tape measure on Chris's workbench... 😉. So, the "workshop elves" quickly laid down some ship-decking-style flooring.
I can barely distinguish the parts from the original engine and model anymore.
Great work, Chris.

Michael

Those fiddly bits look VERY fiddly, but they look great! 

Looks  very cool, I like the set up with the little gas torch. It seems very happy chugging away and makes a great sound! 

I cleaned up the cylinder first with a honing tool in the drill, then went on to make the piston; seems like a nice sliding fit. That's both end of the piston rod completed just need the actual rod! 

https://www.youtube.com/shorts/Sz9lTB_eFtU