Re: Sorocabana

davidtltc Wrote:
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> Anyone here have a photo or two of the narrow
> gauge outside framed Mallet Articulated
> Locomotives that operated on the Sorocabana RR in
> Brazil? I have acquired a Baldwin 1915 Catalog
> with in its pages is a view of one of these
> locomotives, I didn't realize that these
> locomotives were in existence. What year did
> counter balance weights start to appear on the
> Narrow gauge locomotives(K-27 1909?). The frames
> seem small on these locomotives but the
> counterweights look similar to the ones used on
> the K-36's .


You ought to be able to look the Baldwins up in the specification books hosted online by Degolyer library. You won't get the photograph as on the cards, but you'll get all the rest of the detail information, and a lot more besides.

Counterbalance weights existed on locomotive driving wheels from the very early days since they're a necessity at any but the absolute lowest speeds. I assume your question refers to crank-mounted counterweights on outside frame locomotives; Baldwin started to do that sometime shortly after the turn of the century (within a few years). I'd have to look up a specific date if it's needed. Prior to that, counterweights were wheel-mounted as seen on locomotives like the Moguls delivered to the Maine two-footers in the 1890's or the C-21's.

Metre gauge was and remains essentially standard gauge in Brazil since the metre gauge represents probably eighty per cent or more of its national network. "Narrow Gauge" in that country most usually refers to routes like the 30 inch gauge portion of the Oeste de Minas.



Edited 5 time(s). Last edit at 05/14/2018 03:02PM by James.