Scotia Pacific Lumber locomotive (1660)

Historical & Architectural Gems

Would be great if you could post this in our thread for Vintage Transport on the discussion page.
www.ipernity.com/group/332973/discuss/152895

Have a lovely day :-))

Just posted, thank you for inviting!

A strange locomotive configuration, Don. There doesn't seem to be any driving wheels! Presumably one or both of the bogies were driven? It would be interesting to see how the drive system was arranged.

I found a link describing it as geared -- see the links added to the description.

Thanks Don. It explains it well. I haven't seen a steam locomotive with a "V"-configuration of its cylinders like that before, but it explains the view better. Steam locomotives were always low efficiency machines, so I hadn't really considered that the designers would also use cross-transmission links to the bogies (it looks like US people call them "trucks"!) from the main crank-shaft, which also reduces the transmission efficiency. In the UK most locomotive pistons drove directly onto a driving wheel shaft, and then the other driving wheels were coupled by the outside drive bars to the other wheel sets, all in a straight line to minimise losses.