[modeleng] Re: Steam Engine Valve Events

At 08:46 PM 4/17/07 +0100, you wrote:
>Several books described a way of analysing steam engine valve events by
drawing a circle and dividing it up and dropping perpendiculars etc.
>Can anyone help me out please?  Cheers, Roger

Roger,
    As I recall it's the Zeuner Diagram


Regards,
Harry Wade
Nashville  Tennessee

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