[modeleng] Re: boiler making
- From: Allen Messer <al_messer@xxxxxxxxx>
- To: modeleng@xxxxxxxxxxxxx
- Date: Wed, 11 Jan 2006 09:47:20 -0800 (PST)
"...Paraffin burning Spam cans..." LOL! That is a
good one!!
Al Messer
--- Dave Beaman <davebeaman@xxxxxxxxxxxxxxxx> wrote:
> The vacuum on steam locos is generated by a vacuum
> ejector(s). Most locos
> have 2 ejectors, a large to create vacuum quickly,
> i.e. if to much brake has
> been applied and vacuum is to low to allow release,
> and a small ejector to
> maintain the vacuum whilst running. The GWR had to
> be different and instead
> of a small ejector, they used a vacuum pump to
> maintain the vacuum whilst
> running, this was driven off the crosshead and is
> sometimes called a
> crosshead pump. These pumps are very useful if you
> are struggling for steam
> but they can be unreliable and not maintain the 25"
> required on a western
> engine to keep the brakes off, you have to keep
> using the large to create
> the full 25" of naff all.
> Diesels locos that were fitted with vacuum brakes
> had an exhauster driven
> from somewhere in the tin box, I don't know much
> about paraffin burning spam
> cans.
>
> Dave.
>
>
> ----- Original Message -----
> From: "Jesse Livingston" <fernj1@xxxxxxxxxxxxx>
> To: <modeleng@xxxxxxxxxxxxx>
> Sent: Tuesday, January 10, 2006 9:53 PM
> Subject: [modeleng] Re: boiler making
>
>
>
>
> > The Vacuum bag is the thing that allows 21" (or
> 25" in western cases!) of
> > naff all goin through a pipe. This is the thing
> that takes the brakes off,
> > naff all!!!
> >
> > Dave.
>
> Say Dave man, how dey generates de vacuum for ter
> hold orf the brakes, wid
> an ejector or pump?
>
> Jesse in rainy, but warm Tennessee
>
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