[modeleng] Re: Steam Engine Valve Events

Moving the topic slightly, there's an article in this month's EIM about 
Walschaerts valve gear. hear the author mentions a 0.010 inch lead. My 
question is this: Would such a small  lead make that much difference even 
though it is a non negligible portion of the valve travel? Is it fair to 
consider steam as totally fluid on such a macro scale, and wouldn't 
turbulent effects etc mitigate against small differences just as 12 inch 
to the foot steam, small orifices gave 'wire drawing' effects akin to 
increasing supoerheat?
Peter Chadwick
Swindon

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