Paul wrote:

Big snip:

Here is a good article from Mazda Sport Magazine.


Excerpt from:
Slippery Business by Royce Branch
Mazda Sport Magazine May/June 2004

Still another key factor is film strength, a measurement of the amount of pressure needed to force a film of the oil out from between two flat pieces of metal. Some synthetics post film
strength of over 3000 pounds per square inch; for petroleum oils, the average is less than 500.

Fred O. asks:

Does the ability of a journal bearing to sustain side loads relate
directly to film strength?
For example, does 3000/500 = 6 times the side load capability?

Yes is if you are using a plain bearing thrust bearing but the Mazda rotary
uses a needle thrust bearing. I am not sure what you mean by side load?
The rotor and main bearings see only radial loads. In other words loads
only in the radial direction.

I also don't know if this applies to ball or needle bearings.

Paul Lamar
 
The Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2004 All world wide rights reserved.