davidtltc Wrote:
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>
. . . do I see the Vulcan cylinder saddle or is
> that a Simple Slide?
davidtltc {also} Wrote:
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> 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:
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> 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] sums it up best as he corrects a few misunderstandings in other posts on that thread.
-
Der Grossväterlich DünkelOlivGrünDampfKesselMantelLiebHabender
* All of the K-27s that were converted from slide 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 facilitate continued use of their existing inboard – 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) – Walshearts valve gear. When the four with piston valves and Stephenson gear (#454, #456, #458 & #461) were later converted to Walshearts, an extra offset or crank was added to the valve gear to avoid the expense of casting new cylinders (see drawing at [
ngdiscussion.net]).
Edited 4 time(s). Last edit at 11/22/2017 02:45PM by Russo Loco.
