[modeleng] Re: sprockets

No AJ, unfortunately that won't serve - the key to the operation is the
chain running around the outside of the (aprox) 500mm dia disk. The disk is
mounted under the turning pond at one end of the set up & the chain carries
the magnets that pull the barges along. The barges will require at least the
500mm turning circle. I had thought of an MDF disk fitted with pins in the
edge - probably every 3 or 4 links - may even revert to that idea & do some
experimenting yet

----- Original Message -----
From: "alanjstepney" <alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Tuesday, August 31, 2004 8:40 PM
Subject: [modeleng] Re: sprockets


> Tel,
> Not knowing quite what you want to achieve, or how you are planning to do
> it, this might be a bit of a silly question.
>
> But, could you not use a 120 tooth sprocket, and either gear it 2:1, or
fit
> it with a simple escapement such that it indexes the rotation of the
> sprocket by half a chain-pitch?
> The latter could be quite easy and might save you making all those teeth.
>
> alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>
> www.alanstepney.info
> Model Engineering, Steam Engine, and Railway technical pages.
>
>
>
> ----- Original Message -----
> From: "Terry Lane" <tel@xxxxxxxxxxx>
> To: <modeleng@xxxxxxxxxxxxx>
> Sent: Tuesday, August 31, 2004 10:21 AM
> Subject: [modeleng] Re: sprockets
>
>
> That would be too easy Jeff. Actually I had a look & the biggest 1/4"
pitch
> sprocket my supplier lists is 125t - fair way short of the 240 odd teeth I
> need
>
>
>
>
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