A mail list I am a member of (it's for physics lab managers) raised the issue of thermal expansion of train rails (or tracks). Specifically, the issue was how thermal expansion and contraction are allowed for in rail design, especially in welded rail. But that led me to a regular buffet of units...
In the process of surfing the web, I came across this page from Sweden. I enjoyed reading this in metric units, suffice it to say. http://www.charmec.chalmers.se/railtech/suncurves.html For mixed units, see http://www.trainweb.org/railwaytechnical/track.htm In fact, the root URL provides an interesting menu of related topics. Jim -- James R. Frysinger Lifetime Certified Advanced Metrication Specialist Senior Member, IEEE http://www.cofc.edu/~frysingj [EMAIL PROTECTED] [EMAIL PROTECTED] Office: Physics Lab Manager, Lecturer Dept. of Physics and Astronomy University/College of Charleston 66 George Street Charleston, SC 29424 843.953.7644 (phone) 843.953.4824 (FAX) Home: 10 Captiva Row Charleston, SC 29407 843.225.0805
