Re: [CBQ] CB&Q 6100

[Sam Cook <trains@sjcook.com>]

As former foundryman....
Casting a solid wheel is difficult because of the shrinkage when the iron cools.
It shrinks and will pull cracks in the casting.
The holes (or spokes) allow some flexibility, avoiding cracks.
Curved spokes is even better than straight spokes.
Iron shrinks 1/8" per foot.
Also saves material and makes the finished part lighter and easier to handle
with very little sacrifice in strength.

Sam Cook, Milan, MO
===================

John D. Mitchell, Jr. wrote:
>
>
> It made the wheel a little lighter but I think the main reason behind it had 
> to do with the casting process.
>
> --- On *Tue, 2/26/13, Mitch /<soocarman79@yahoo.com>/* wrote:
>
>
>     From: Mitch <soocarman79@yahoo.com>
>     Subject: [CBQ] CB&Q 6100
>     To: CBQ@yahoogroups.com
>     Date: Tuesday, February 26, 2013, 6:07 AM
>
>     I was looking at the picture of the 6100 that was posted and noticed the 
> front wheel. There are 4 holes in the web of the wheel. What is the use in 
> that?
>     Mitch


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