[CBQ] Re: CB&Q 6100

["Mitch" <soocarman79@yahoo.com>]

How come freight car wheels didn't have them?  They were cast iron at the time 
also.
Mitch

--- In CBQ@yahoogroups.com, Sam Cook <trains@...> wrote:
>
> 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@...>/* wrote:
> >
> >
> >     From: Mitch <soocarman79@...>
> >     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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