Pressure vs Flow Regarding Wear Revisited

[RI_RS4]

G-Man, the source of the wear in the articles that AEHaas sites are the cylinders and rings, not the bearings. This has been missing from this discussion.

The other thing that he fails to mention is that the tests that were performed artificially heated or cooled the oil. The higher wear numbers occurred when the oil was kept at a lower temperature than it would have normally been in the block, while the temperature of the coolant was allowed to stabilize. There is not much generalization that you can do to the GM paper.

 

[G-MAN]

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G-Man, the source of the wear in the articles that AEHaas sites are the cylinders and rings, not the bearings. This has been missing from this discussion.

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Well, that brings us back to this study:

 

[jaj]

You mean that 30 years ago when I gave up on all that stuff and went back to first principles for sizing conductors because I couldn't get usable results in the lab (I had to handle 10,000 amp surges and 30 amp continuous currents on single-sided PCB's) it was because the charts and tables were wrong? Imagine that! I always thought I was just violating some design rule that applied to the tables but not to my application, and since my stuff worked (ie-it passed UL and CSA testing), I didn't bother to figure out why.

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As an engineer myself, I hate rules of thumb... I just recently researched the origin of formulas and tables for the heat rise of copper traces on printed circuit boards, which have been published for years. It turns out that the accepted wisdom, which had been codified in specifications, was just plain wrong, due to misunderstanding of the original National Bureau of Standards research in the 50's.

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[bulwnkl]

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I have shown that oil flow is very important.
aehaas

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I missed that somewhere. Have you done more work than is captured in your treatise on thick vs. thin oil? If so, would you kindly point me in the right direction?