[modeleng] Re: Valve Gear Modifications
- From: "Pendragon" <idpriest@xxxxxxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Sun, 5 Dec 2004 16:17:00 -0000
Barrie,
By any chance re the replacement parts were there any changes to the
eccentric rod and or the valve bobbin or I suppose thinking about it the
width of the valves on the bobbin....I fear that the eccentric rod I
have is too long and and the valve bobbin too short.
My understaning of walsharts is that providing the parts are made
correctly then the system should work well, and that a pooly designed
system will not work well and or a pooly made correctly designed system
will not work. Now then as I regard that my workmanship is good and
better than most amateur engineers and that I have bushed the original
Winsons bits and bobs out so that there I little or no play then the
only thing to deduce as to why it will not run correctly is that the
design was poor to start with.
If you can be of any assistance I'd be gratful, I am reluctant to remove
the liners from the cylinders [I didn't fit them] and I believe they
have been glued in place, this makes measuring the internal orifices /
distance between ports and port dimensions difficult to say the
least.........if I hade these measurements I might be able to redesign
to at least make an acceptable running engine............ah well might
be something to do on Christmas morning!!!!!!!!
I have never seen the Perrier drawings I take it there is considerable
difference to the Winsons version.
Regards,
IP
Priest & Sons Model Engineers
http://www.kinvermes.pwp.blueyonder.co.uk/p1.htm
-----Original Message-----
From: modeleng-bounce@xxxxxxxxxxxxx
[mailto:modeleng-bounce@xxxxxxxxxxxxx] On Behalf Of BarriePurslow
Sent: 05 December 2004 13:28
To: modeleng@xxxxxxxxxxxxx
Subject: [modeleng] Re: Valve Gear Modifications
Hello Ian,
I received the Winson valve gear mods for my Brit. I tried them on the
engine but could not notice any difference. The basic problem I had was
the abyssmal design of piston valves allowing leakage between the
bobbins and the liners also leakages between the liners and cylinder
body.
I am at a loss to understand why you need the reverser in full reverse
gear to get it to go forward. Although I do recall that the thread on
the worm drive was R.H. and I changed it to L.H.....but you're not that
daft?
The best advice I can offer is to build it to the Perrier drawings. The
Winson Brit was based on these - they bastardised, sorry, productionised
it!
Regards,
Barrie Purslow
Warrington UK
----- Original Message -----
From: "Pendragon" <idpriest@xxxxxxxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Saturday, December 04, 2004 10:41 PM
Subject: [modeleng] Valve Gear Modifications
> Greetings all,
>
> Saga of the Winsons Brit continues. I have just spent about two hours
> trying to set the valve gear on only one side of the engine. I can
> just about get it managable providing the reverser is in 100% back
> when I want to get the loco goinf forwards .....no I haven't got any
> of the bits in the wrong place or set in the wrong quadrant...not
> quite that daft yet!
>
> I am aware that Winsons had problems with this valve gear and
> developed a modification, has anyone get any details.
>
> Regards IP
>
> Priest & Sons Model Engineers
> http://www.kinvermes.pwp.blueyonder.co.uk/p1.htm
>
>
>
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