Well today I managed to devote my attention to sorting out my non-running Open Column engine. The problem was resolved by remaking the main bearing block and the crankshaft, aiming for a very close fit. As the porting on this engine is by way of flats on the crankshaft a close fit is essential, almost to the point of tightness. This is to minimise loss of pressure along the bearing bore. I am pleased, and relieved, to say the engine did run but required something like 40 p.s.i. to overcome the initial stiffness but after half an hour or so the engine was running fine on less than 10 p.s.i. and I think this will continue to reduce as the engine is run in.
You’ve read the book now see the video !
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- The finished engine showing the forward/reverse control lever.
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- The finished engine sporting its replacement main bearing block and crankshaft.
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- A pleasing little engine from Elmer’s prolific drawing board well worth adding to your ‘to do’ list.
Nice little runner there John :-) Elmer’s engines are great!
Good to see you’re keeping your machines busy (unlike me!)
Ralph.
Thanks for your kind comments. You are absolutely right – I have produced one or two short movies (see http://www.youtube.com/watch?v=qz60su0XuUs )
I am considering adding an extra page to my site specifically to provide links to videos of completed engines).
John