Re: Uintah #50 valve gear

Lenicheck Wrote:
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> To all you valve gear experts out there:
>
> It is apparent from the attached photo that the
> Uintah 2-6-6-2 #50 is configured to have the two
> sets of piston valves set in opposite directions
> for running- one radius rod is up and one is down
> (see the red highlights). How is this possible
> given that the two mechanisms both have piston
> valves which are, assumably, inside admission with
> the combination lever being attached above the
> valve rod? What am I missing?
> [attachment 69947 Unitah50.pdf]

The eccentric cranks are set differently, the rear one leans to the rear for indirect motion, and the front one leans to the front for direct motion. This was pretty common for articulateds so the one engine's radius rods would counterbalance the other's.