[modeleng] Re: Superheater trouble
- From: <clif.gwr@xxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Tue, 13 Nov 2007 13:40:37 -0000
Hi All,
I have never been a fan of Superheaters as they are a lot of bother to try
and increase the efficiency of a machine operating at about 1.5% efficiency
if you are lucky.
The only thing that they do is dry the steam a bit which means that the
exhaust is a bit drier and therefore does not steam my glasses up so much.
Regards
Clif
----- Original Message -----
From: "The Sheppard Residence" <psbr20252@xxxxxxxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Monday, November 12, 2007 11:43 PM
Subject: [modeleng] Re: Superheater trouble
> 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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>>
>
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