Re: What's that?

Earl Wrote:
=======================================================
> The piece of wood is wedged in under the running
> board to hold the relief valve on top of the valve
> chest open. 478 appears to be suffering from a
> leaky throttle and the relief valve won't stay
> open because of the blow-by past the throttle
> valve. By not doing this, the relief valve would
> snap shut, pressure would build up in the
> cylinders and 478 would wander away.
>
> Been there, done that.
>
> The snow covering everything is a nice touch.

Exactly. Career steam railroaders who haven't done that to hold a snifter open please raise your hands...