[modeleng] Re: non runner

Hi Ken,

I go along with Barrie and others- it sounds like a valve problem. Did you
lap the valves and valve seats before assy? If so, it may be a buckle/valve
issue as others say, or maybe not enough valve travel somehow.

Good luck, Jeff Dayman Waterloo Ontario Canada





----- Original Message -----
From: "Barrie Purslow" <bpduo@xxxxxxxxxxxxx>
To: "Model Engineering List" <modeleng@xxxxxxxxxxxxx>
Sent: Tuesday, August 30, 2005 6:11 PM
Subject: [modeleng] Re: non runner


> Hello Ken,
>
> This sounds like your valves are not sealing. I think that Conway is a
slide
> valve engine in which case I would guess that one or both slide valves are
> not sitting on the cylinder face. Suggest you remove the valve chest
covers
> and check that valve is not being held off by the piston rod / buckle.
>
> Good luck,
>
> Barrie Purslow
> Warrington UK
>
>
> ----- Original Message -----
> From: "Kenneth Swales" <kenwillowbend@xxxxxxxxx>
> To: <modeleng@xxxxxxxxxxxxx>
> Sent: Tuesday, August 30, 2005 7:07 PM
> Subject: [modeleng] non runner
>
>
> > Hi
> >
> > I'm building (well trying)a 3 1/2 NG Conway.
> >
> > I have run the engine on compressed air.  I have now
> > assembled it and got steam pressure up to 70.  Opened
> > the regulator valve and it went straight through and
> > up the chimney.  I tried turning the engine over but
> > it made no difference other than different pressures
> > at different positions of the stroke.
> >
> > What am I doing wrong?   Any Ideas.
> >
> > Cheers
> >
> > Ken
> >
> >
> >
> >
> >
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