[modeleng] Re: Superheater trouble
- From: The Sheppard Residence <psbr20252@xxxxxxxxxxxxxxxx>
- To: modeleng@xxxxxxxxxxxxx
- Date: Mon, 12 Nov 2007 23:43:24 +0000
On my Simplex I had a radiant super-heater - it poked up into the top of
the firebox. The tubes were stainless steel as was the return
block/bend (as in the Simplex book). The stainless steel was brazed by
a friend and I silver soldered copper to the stainless at the smokebox
end which itself was silver soldered into the wet and dry headers.
I don't think that even with the radiant super-heater you dry much of
the steam, so I wouldn't worry about the slide valves, all they need is
lubrication from the steam oil and whether it is wet or slightly damp
makes little difference.
When I was building my Simplex the debate wasn't about damaging slide
valves, it was whether or not in a 5" gauge locomotive that the
super-heater had any effect anyway!
Cheers
Peter
Does that make sense?
Cheers
Peter
Gmx22@xxxxxxx wrote:
> Hi all, I don't normally write much here but do read with interest most of
> your comments. I am getting on well with a simplex but can't seem to get the
> super heater right. The people I have spoken to have two schools of thought.
> 1
> because it has slide valves Don't use a radiant one something to do with wet
> steam being better. make it out of copper. I have just come in from the
> garage having turned another peace of copper tube into scrap, lots of
> heating and
> i just can't get the tight bend required to make it look neat. Other school
> of thought is make it radiant using stainless and use thinner tubing 22g I
> think. any thoughts on how to bent copper tube or where the hell do I get
> stainless from, tried GLR and the guys a Polly. I have seen lots of super
> heaters
> made out of SS and look neat with perfect bends but nobody can tell me where
> they got the stuff.
> I have a tube bender but the radius is not small enough and of course it is
> metric 10mm and I am using 7/16 18g copper......... well I was! I know you
> will probably think how has he got this far if he can't bend copper tube but
> things have gone very well up to this point, I just can't afford to keep
> throwing copper in the bin.
> Great site keep up the good work
> Keith
>
>
>
>
>
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