John K Wrote:
-------------------------------------------------------
> Interesting. Here's a question- did the major
> builders use standard dimensions for slide valves,
> or did these conversions need to be custom built?
Yes and no. For a given builder, and a given size cylinder, the valve dimensions could be pretty much standardized. But considering all of the different builders, and all of the different cylinder sizes, I suspect that the draftsman and pattern makers at Franklin were kept busy cranking out short lead time single engine orders for conversion kits.