Re: K-27 Vauclain to simple to piston-valve Verwandlung

Russo Loco Wrote:
--------------------------------------------------
> 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 w/ piston valves (both inboard &
> outboard)* has been discussed several times
> previously.  IMHO, Michael Allen's post at
> [ngdiscussion.net] 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 con-
> tinued use of the existing internal – between
> the frames – Stephenson valve gear. The la-
> ter ones had cylinders cast with outboard PO-
> SITIONED valves to align with new external –
> outside the frames (& counterweights) – Wal-
> shearts valve gear.  When the four w/ piston
> valves & Stephenson gear (#454, #456, #458
> & #461) were converted to Walshearts, an ex-
> tra offset or crank was added to the valve gear
> to avoid the expense of casting new cylinders
> (see drawing at [ngdiscussion.net]).

davidtltc Wrote:
--------------------------------------------------
> Thanks for the corrections Russo, good stuff.


Not to worry, Dave -

When I first heard someone talking about link-and-pin couplers, I thought he said "Lincoln Pin", and it was years before a kind soul set me straight.  The mix-up of Vulcan and Vauclain is also pretty common (see [ngdiscussion.net] for example), as IIRC there actually was an early manufacturer of locomotives named after the roman god of volcanoes – Vulcan – although I doubt that they ever made any compounds.  Also, one of my fellow wild-eyed foamers sometimes refers to steam smoke-a-lot-ives, with good reason IMHO, as "portable volcanoes".

- Gregor der Ungeziefer, Opfer eine Verwandlung