[modeleng] Re: Parts prices
- From: "Clifton" <clif.gwr@xxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Wed, 26 Sep 2012 17:57:50 +0100
Hi Jesse,
I will take a photo but it will be of the pump loosely assembled. As I have
never got the steam cylinder to work I have never totally put it all
together.
Regards
Clif
----- Original Message -----
From: "Jesse" <fernj1@xxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Wednesday, September 26, 2012 5:35 PM
Subject: [modeleng] Re: Parts prices
> Clif, just for the heckofit, send me a photo of that Southworth pump.
> Never heard of one and would like to see a pic. Many thanks,
>
> Jesse fernj1@xxxxxxxxxxxx
>> Clif,
>> There was one of the full-size pumps that used a shuttle valve as you
>> described.
>> Not sure why yours doesnt work.
>>
>> Never having seen or played with one, I cant offer any suggestions
>> though.
>>
>> Alan
>>
>>
>> On 25/09/2012 17:57, Clifton wrote:
>>> Hi All,
>>>
>>> On Duplex pumps I have been building one of the Southworth steam feed
>>> pumps,
>>> the little 3" high one& it is driving me round the twist.
>>>
>>> On a full size pump it is usual to have a rocking arm to transpose the
>>> down
>>> motion at the end of the piston rods travel to an up motion of the steam
>>> slide valve to make it double acting. (& vice versa at the top of the
>>> stroke). This little beast uses a slide valve which via steam passages
>>> operates a shuttle valve which then moves the main steam valve in the
>>> opposite direction.
>>> As the whole pump is only 3" high you can imagine the size of the steam
>>> chest which has two slide valves& a shuttle valve in it.
>>>
>>> I have now spent about a week trying to get it to work including making
>>> three news sets of slide valves& a new port face. I have trued to slide
>>> valve faces& port face using engineers blue& as far as I can see it is
>>> perfect.
>>>
>>> But will it go, will it heck!
>>>
>>> I think a bit of redesign is going to happen to get a rocking arm in.
>>>
>>> Regards
>>>
>>> Clif
>>>
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