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Re: [RC] aluminum stirrups - Truman PrevattSisu West Ranch wrote:I expect the difference of service life has more to do with the actual quality of each individual stirrup than anything else. When I was in college I worked on a summer intern program at Whirlpool in the quality control lab. There was an Aluminum flange that went into the refrigerator compressor. It was a very important part of the compressor. It took stress and if it broke - the compressor was junk. We would inspect each new lot. We would do a chemical analysis since the spec called for a high quality alloy. We would also X-ray several to find "bubbles" from the molding process. We would do a physical stress analysis - both torsion and shear. There would be times we would reject several lots in a row simply based on X-ray. There would be a lot of air bubbles in many lots. There would be times we would reject based on shear strength. Although this was high grade stuff and expensive for Aluminum parts - the variation in quality was fairly high. I am sure the process are better today. On the other hand I also suspect the Aluminum that goes into stirrups is not the highest grade of undergoes extensive QC testing. ** -- “It doesn't matter how beautiful your theory is, it doesn't matter how smart you are. If it doesn't agree with experiment, it's wrong” Richard Feynman, Nobel Laureate in Physics =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Ridecamp is a service of Endurance Net, http://www.endurance.net. Information, Policy, Disclaimer: http://www.endurance.net/Ridecamp Subscribe/Unsubscribe http://www.endurance.net/ridecamp/logon.asp Ride Long and Ride Safe!! =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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