Class A front cylinders steam pipe question

[NW Mailing List]

Yes, thanks Jimmy.
And that link to the mallet page, with the cutaway drawings was really
interesting.
It really clarified how the steam is routed under the boiler.
Mike Rector

On Thu, Sep 28, 2023 at 4:14 PM NW Mailing List via NW-Mailing-List <
nw-mailing-list at nwhs.org> wrote:

> Thanks Jimmy for posting those drawing numbers. The steam path to the
> valve chest beyond the slip joint is longer than I thought. The balance
> tube is an interesting detail as well.
>
> Matt Goodman
> Columbus, Ohio
>
> On Sep 27, 2023, at 8:32 PM, NW Mailing List <nw-mailing-list at nwhs.org>
> wrote:
>
> Mike,
>     It is called in drawing D33762 "Ball Joint Housing For Steam To Front
> Engine Class A". Steam enters this housing and is then directed to a
> manifold that routes the steam to the front cylinder, see drawing D34000.
> This manifold also connects to both cylinders. "Steam Beating"? No such a
> thing incoming, but, I will guess that just like a crossflow pipe between a
> cars two exhaust sides, that manifold would tend to equalize pressure
> between the front cylinders.
> <Steam Joint Class A.jpg>
> On 9/27/2023 2:48 PM, NW Mailing List wrote:
>
> *What is the device at the end of the steam pipe and on top of the front
> cylinder called, and what is its purpose? *
> *Does it somehow "buffer" incoming steam "beating"? *
>
> *Did the A and the Y's differ in steam delivery? Am I correct in thinking
> the A's deliver steam using individual side pipes on the side/underneath of
> the boiler, and the Y's deliver steam through a single central pipe under
> the boiler?  What makes each option best fo the individual use case?  I'm
> guessing it has something to do with compound vs simple?*
>
>
> The Y class "Live" steam delivery was also piped outside of the boiler,
> running back to the high pressure cylinder saddle only. Steam delivery to
> the Y front engine was through a central receiver pipe. To learn more about
> how the Y class worked go to this website: Mallet Articulated Locomotives
> (ALCO) - http://www.catskillarchive.com/rrextra/mallet.Html
>
> Jimmy Lisle
> ________________________________________
> NW-Mailing-List at nwhs.org
> To change your subscription go to
> http://list.nwhs.org/mailman/options/nw-mailing-list
> Browse the NW-Mailing-List archives at
> http://list.nwhs.org/pipermail/nw-mailing-list/
>
>
> ________________________________________
> NW-Mailing-List at nwhs.org
> To change your subscription go to
> http://list.nwhs.org/mailman/options/nw-mailing-list
> Browse the NW-Mailing-List archives at
> http://list.nwhs.org/pipermail/nw-mailing-list/
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://pairlist6.pair.net/pipermail/nw-mailing-list/attachments/20230928/1cfcf0df/attachment.htm>