[modeleng] Re: Tr: Re: Steam engine RPM ?
- From: Allen Messer <al_messer@xxxxxxxxx>
- To: modeleng@xxxxxxxxxxxxx
- Date: Tue, 6 Sep 2005 18:21:21 -0700 (PDT)
If this is a working display model, you don't want it
operating so fast that the workings of the motion are
blurred, do you?
Al Messer
--- alan Stepney <alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
wrote:
> As far as I am aware, there is no absolute formula
> for speed against engine
> size.
> There are many rough guides, with the actual
> limiting factors being, the
> valve gear, inertia in moving parts, and general
> inefficiency, plus the
> normal design criteria.
>
> At a guess, that size of engine would probably turn
> at around 500-600 rpm
> without too much trouble.
> It is quite a long stroke for the bore, which will
> limit speed.
>
> Alan
>
>
>
> ----- Original Message -----
> From: "Pcx" <pierre.courbouleix@xxxxxxxxxx>
> To: <modeleng@xxxxxxxxxxxxx>
> Sent: Tuesday, September 06, 2005 7:24 PM
> Subject: [modeleng] Tr: Re: Steam engine RPM ?
>
> > Hi All,
> When discussing with a friend we had this question (
> may seem crazy to the
> most experienced of You), for which we found no
> reliable answer, how to
> calculate (estimate?) the running speed of a steam
> engine (RPM) knowing the
> type of engine (single/double acting, condensing/non
> condensing), the
> stroke,the bore and the inlet steam pressure ? For
> your info we are building
> an horizontal slide-valve steam engine 1 1/2 bore, 2
> 1/4 stoke , of a type
> inspired from an old design .
> > I thank you for your help and the infos you can
> forward ....
> > Regards
> >
> > pierre.courbouleix@xxxxxxxxxx
> > Pierre
>
>
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