[modeleng] Re: Winson 14XX

Hi Clif

Is this with the engine running on air, with the wheels clear of the rails?

Regards
Ron Head

----- Original Message ----- 
From: "Clif Walker" <clif.gwr@xxxxxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Saturday, October 30, 2004 10:29 PM
Subject: [modeleng] Winson 14XX


> Hi All,
> My Winson 14XX still has the ability to confound.
> Whilst sorting out it's steam tests and the blow from the valve gear there 
> was always a "boink" whilst running.At first I thought it was a bigend and 
> did find a bit of play in one.I fixed that but the knock was still there.I 
> next checked the other big end,took up a minute bit of play in that but 
> the boink still carried on.On checking again I found a bit of play in a 
> little end,made a new pin for that but the noise still went on.
> Now at last I think that I have found it.
> Winsons design only seems to give about a total clearance of about 15 thou 
> for the piston at the end of the cylinders.This has the net result that if 
> the assembly of the piston rod to the crosshead and con rod to the big end 
> is  7 thou out at either end of the stroke,the piston hits the end 
> cylinder covers.
> I think that even the momentum of the piston or it bit of play in the 
> bearings would also allow it to do it.
> I suppose that when I was testing the chassis on air,because of the noise 
> from my compressor I did not hear it.
>
> Modifications are again in hand.
> Oh boy,am I getting good at taking this loco to bits.
>
> Regards
>
> Clif
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