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Kiwi Bloke	09/10/2020 10:33:37
912 forum posts 3 photos	Emgee - no doubt you're right. I thought the novel principle that Chaddock brought to the problem was heat-setting the rings. My understanding is that this doesn't produce a perfectly-shaped ring, necessitating final skimming, so Trimble's approach may be a bit lacking. What rankles, however, is the credit given to Johhny-come-lately, Trimble. It's like the electric light bulb. Edison improved it and made it practicable, but he didn't invent it - that was another British invention.
Emgee	09/10/2020 11:36:16
2610 forum posts 312 photos	Yes no doubt Trimble was aware of the earlier work done by Prof Chaddock, perhaps that's the reason he suggests turning the rings OD to bore diameter, if scaling can be prevented it is less work than finishing the rings to diameter after slitting/breaking and heat treatment, also any minimal out of round shape will be so small that when fitted to the cylinder it will not be detrimental to the engine performance when bedded in. Emgee

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