[modeleng] Re: Tall Tales? Jesse's superheat free run away
- From: "JESSE LIVINGSTON" <fernj1@xxxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Fri, 4 Mar 2005 18:54:08 -0600
Rich,
I am sure you are correct as what was happening only occurred when I opened
the throttle too quickly or had too high water level in the boiler. Also,
the problem was exacerbated by the fact that I had too much water treatment
compound in the tender water. The result was I had way too high of a Ph
and anything over 11Ph will cause excessive foaming as we all know. I use
the LSB 8000 compound in my boilers now instead of using "homebrew" as I did
in the past and everything seems to be running perfectly. One nice thing
about the stuff I was using was that it was "free". All I had to do to
obtain it was to make a stop in the boiler room at our sawmill and siphon a
gallon out of one of the barrels sitting by the feed water pumps.
Unka Jesse.
> Possibly as the water from the boiler, which is at around 150degC, passes
> through the constricted path after the regulator, the resulting drop in
> pressure enables the water to turn to steam - this rapid expansion being
> what caused your loco to race (I may of course be wrong).
>
> The prescence of a superheater would cause further steam expansion -
> although quite which 'mechanism' would dominate I don't know.
>
>
> Yours,
>
>
> Rich.
>
> On Fri, 4 Mar 2005, JESSE LIVINGSTON wrote:
>
> > I have had my RRSC American suddenly race from priming while on jacks
and
> > running free. No superheat on the 4-4-0.
> >
> > Unka Jess
> MODEL ENGINEERING DISCUSSION LIST.
>
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