[modeleng] Re: Injectors - asking the question again
- From: "Jeff Dayman" <jeffdayman@xxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Thu, 9 Dec 2004 07:40:19 -0500
LBSC describes one at length in his "Live Steam Book" and goes into some
design guidelines for scaling up as well. MJH Ellis writing in Model
Engineer earlier this year desribed one that works with a flap valve,
theortically less fussy than the ball type. I haven't built either, but read
the above and it seemed to make sense.
However, getting back to thread, neither of them mentioned whether they were
sensitive to alignment vertically. Have you thought about a call to a
commercial injector supplier, to see what they say about it? (or better yet,
test some for you and let you know for sure)
Good luck, Jeff Dayman Waterloo Ontario Canada
----- Original Message -----
From: "Tim Rickard" <the_viffer@xxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Thursday, December 09, 2004 7:00 AM
Subject: [modeleng] Re: Injectors - asking the question again
>
> I would have thought that you'd not need a very big one: I'd probably go
for
> a number 2 (errm is there another way of saying that?) which would deliver
> 1/2 pint a minute via 5/32 pipe. I tend to use number 4s on my 5" gauge
> locos which injectors are about twice the size and quite big enough for
the
> much larger boilers.
>
> Personally I buy 'em but I think there was a series by DE Lawrence in
Model
> Enginner around 25 years ago with lots of detail. A search of the ME index
> would turn it up I'm sure.
>
> >From: Roger <roger.g3tdm@xxxxxxxxxx>
> >Hi,
> >
> > Whilst on the subject of injectors, some of you will know that I am
> >trying to finish off an Allchin traction engine in 1-1/2" to the foot
> >scale.
> >
> > I have got round to piping the various steam valves to their
> >appropriate destinations. One of them goes to the injector. To my
> >surprise the original articles (I have them all bound together as a
> >builder's manual) has no mention of the injector, other than to show
> >you where it is located.
> >
> > Anyone know what sort of size injector is used on this model
> >engine. Anyone have references to a design of a suitable size that
> >works with steam pressure up to about 80 psi?
> >
> > Thanks in advance.
> >
> >
> > Cheers,
> >
> >
> > Roger Mason, in St. Agnes.
> >
> >MODEL ENGINEERING DISCUSSION LIST.
> >
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>
>
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