Re: K-27's - First Four between 2nd & 3rd rebuild ...

Russo Loco Wrote:
-------------------------------------------------------
> Earl Wrote:
> --------------------------------------------------
> -----
> > While there are no pics of an inboard piston
> valve
> > mudhen with Stephenson gear to be found (yet),
> > there is evidence that they existed as such.
> >
> > First, there is a D&RG drawing dated in the
> > mid-late teens of of a piston valve mudhen
> > with "old style valve gear".   Secondly,
> the
> > AFE's show 454-6-8-61 getting piston valves
> > around 1918 not getting superheated
> > and Wahlshearts gear fitted 'til the 1920's.
>
>
> Thanks for the confirmation, Earl -
>
> ... and there's really no other reason for inboard
> piston valves; they lined up well with the
> existing Stephenson gear that was retained for a
> few years, and only required an extra link or
> offset crank when later converted to
> Wahlshearts.  It was a LOT less expensive to
> add the offset crank to the Wahlshearts gear than
> to have new cylinders cast with outboard valves
> that would line up without the added complexity of
> the crank.
>
> This drawing has been posted previously, but I
> have tinted the offset crank (I don't know what
> else to call it) and its associated bearing block
> red for emphasis:
>
>
> - Russ

Hey Russ,

So what is that worm gear, shaft and supports doing on the third driver's axle? Hmmm... maybe an early attempt to electrify these locomotives by the D&RGW/RGS???

p.s... I checked my On3 MMI 454 and dangit... MMI/PSC managed to correctly get these extra parts on these models. Now I've got to figure out a way to get the valve gear out of neutral!