Re: Freight Car Wheels
Anthony Thompson <thompson@...>
A.T. Kott said:
Tony - I did not know you are a metallurgist!! I have a couple of
questions for you regarding "wrought steel wheels" - how the heck did"Wrought" means any kind of working. And yes, the wheels are forged in dies.
In one of my previous rambling posts, I discussed casting of trailingI doubt this story very much. Cast steel sideframes for freight and passenger trucks were being marketed shortly after 1900, and were entirely competent castings by 1920. The same is true, after all, for locomotive frame components, drivers, cylinders, and other large and critical steel castings. That a foundry could not "figure out" how to cast a symmetrical shape like a wheel without cracking as late as World War II is just not remotely credible.
Also, someone mentioned that 1" wear was a lot on a freight carI think an inch is about the upper limit. Convert that to pounds on four 33-inch wheels and you'll be surprised at the number.
Tony Thompson Editor, Signature Press, Berkeley, CA
2942 Linden Ave., Berkeley, CA 94705 www.signaturepress.com
(510) 540-6538; fax, (510) 540-1937; e-mail, thompson@...
Publishers of books on railroad history