[Steam-engine] Reworking Governor

[badams at tractors.bloomington.in.us]

Andy,
 	I would be quite comfortable using brazing rod.  The 
linear coefficient of expansion per degree centigrade for brass/bronze is 
17-22 X 10 -6, for cast iron it's 8.5-10.5 X 10 -6  On a 2" spool over a 
150 degree operating range it would seem to be a minor factor if the 
brass/bronze is well attached.
 	The major issue with building up the spool might be keeping it 
from warping and cracking as you add material.  Not my area of expertise.
 	It seemed to me it would be easy/fun to make a new spool from a 
hunk of brass.
Hope this helps,
Brice

On Mon, 28 Feb 2005, Andy glines wrote:

> I had a chance to take a good look at the governor on
> the Huber this weekend.  What I found didn't surprise
> or upset me.  What I observed was normal wear in the
> valve itself.  The the seats are slightly out of round
> where the spool slid in and out for many years.  The
> spokes on the spool are worn also.  My plan is to bore
> the seats to true them up and the build up the spool
> and turn it to match the seat.  What is the best way
> to build up the spool?  I can braze it but I'm
> concerned that the brass will not hold up well and I
> will have to do the job again in short order.  What do
> you think?
>
> =====
> Andy Glines
> Evansville, IN
>
>
>
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