Russo Loco Wrote:
-------------------------------------------------------
> davidtltc Wrote:
> --------------------------------------------------
>
> >
. . . do I see the Vulcan cylinder saddle
> or is
> > that a Simple Slide?
>
> davidtltc {also} Wrote:
> --------------------------------------------------
> -----
> > Well then that also shoots down my theory that
> > the DRG may have used old cylinder saddles of
> > C-16's to change out the old Vulcan Compound
> > design for repowering the K-27's.
>
>
IIRC, that's "Vauclain", not "Vulcan" –
> named after the inventor of the compound
> locomotive, Samuel Vauclain (see
> [en.wikipedia.org]).
>
>
> Chris Walker Wrote:
> --------------------------------------------------
> -----
> > Class 125 simple had 17x22 cyl: Class 60 had
> 15x20
> > cyl. 450-451-457 and 460 remained unconverted.
>
>
> Righto, Chris -
>
> The multi-step conversion of the K-27's from
> Vauclain Compounds to simple engines with "D"
> (slide) valves and then (most of them) to
> superheated with piston valves (both inboard &
> outboard)* has been discussed several times
> previously. IMHO, Michael Allen's post at
> [
ngdiscussion.net]
> 625 sums it up best.
>
> -
Roosso
>
> * All of the K-27s converted to piston valves
> – like nearly all piston-valve engines
> – were equipped with inside-ADMISSION
> valves. The first four had cylinders cast
> with inboard POSITIONED valves to allow line-up
> for continued use of their existing internal -
> between the frames - Stephenson valve gear.
> The later ones had cylinders cast with outboard
> POSITIONED valves to align with new external -
> outside the frames (and counterweights) -
> Wahlshearts valve gear. When the four with
> piston valves and Stephenson gear (#454, #456,
> #458 & #461) were converted to Wahlshearts, an
> extra offset or crank was added to the valve gear
> to avoid the expense of casting new cylinders (see
> drawing at
> [
ngdiscussion.net]
> 04116).
Thanks for the corrections Russo, good stuff.
Still a Student,
Dave
