Engines > Restoration of Model Engines

Stuart Turner S9

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Don1966:
That looks great Ian, you did a jam up job on it.

Don

Ian S C:
Not knowing anything about steam, what size boiler would an engine this size need, I'm not going to build one, just interested.  The owner says that there was one for it, but the scrap man got there first, and if the state of the boiler was similar to the engine, its proberbly best the scrappy got it, it proberbly would'nt hold water anyway!!    Ian S C

Stilldrillin:
You've done a crackin' job there, Ian!  :)

Very well sorted.....  :ThumbsUp:

David D

Walsheng:
Just perusing through the different sections here and I cam across this thread.
I am getting close to finishing a Stuart #9 and one of the last things I need to do is machine the piston and need to find out how deep to machine the piston ring grooves. It is not on the prints and I am told it is not in Tubal Cain's book.
I have been told a couple of thousandths smaller than the ring ID and have also been told 0.010"/0.020" smaller.
Now I am no mathematician but I do know there is considerable difference between a couple of thou and 0.020".
Anybody know the real answer?

And by the way, nice job on the refurbishing job Ian.

John

b.lindsey:
John, i wouls say .005 to .010 should be enough. The minor dia. of the ring groove mainly lets gasses (from combustion or steam) in behind the rings to help force them out against the cylinder wall.
Bill

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