Re: Slide valve versus other valve gears

Earl Wrote:
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> The "inboard" piston valves on the K27's was the
> first attempt to make better engines of them. The
> drawing for the inboard piston valve cylinder
> blocks date from 1918, some 8 years before the
> superheating program was started. During this
> time, the engines were saturated, piston valve
> locomotives, with Stephenson Valve Gear.
Well, much as I fear to disagree with Earl, really the 2nd attempt. First they were changed to simple from Vauclain compound, 1906-1916. And where do the new rectangular tenders, 1918-1919, fit in this picture?
hank