[modeleng] Re: Parts prices
- From: Jesse <fernj1@xxxxxxxxxxx>
- To: modeleng@xxxxxxxxxxxxx
- Date: Thu, 27 Sep 2012 10:35:51 -0500
Bummer Clif,
Maybe you had just better settle for a small duplex. I have built two
small ones and one a bit larger and they all run perfectly or they do
now that I put the "lost motion" in the valve rods. As I remember the
Audel's article about single cylinder pumps, it seems that most had
extended valve stems so the pilot valve could be manually moved if the
pump failed to start.
Jesse down in very rainy Troy, TN
> Hi Jesse,
>
> I assembled the steam cylinder together with the valve gear & worked the
> first slide valve rod manually.
> If the valve gear had worked the piston rod should have done it's bit.
>
> Despite it's small size I have now had it to bits so many times I can now
> almost take it apart in my sleep.
>
> Clif
>
>
>
> ----- Original Message -----
> From: "Jesse" <fernj1@xxxxxxxxxxx>
> To: <modeleng@xxxxxxxxxxxxx>
> Sent: Wednesday, September 26, 2012 9:06 PM
> Subject: [modeleng] Re: Parts prices
>
>
>> Blimey Clif,
>>
>> 'Ow yer expect the bloody pump to work if it ain't assembled!!!!
>>
>> Jesse in warm Troy, TN
>>> 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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