Mini hopper train unloading coal - GIF

Mini hopper train unloading coal.

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Previously:

https://www.homemadetools.net/forum/...904#post152711
https://www.homemadetools.net/forum/...857#post175340
https://www.homemadetools.net/forum/...393#post177413
https://www.homemadetools.net/forum/...855#post171296
https://www.homemadetools.net/forum/...392#post139012

That sure is a step up from the Sutro Tunnel where mules with blocks of ice strapped to their back were used to haul rock to the surface...

It made me laugh. That train bouncing and banging over those rollers, and the guy standing there banging the side of each car to shake out the coal I assume.

how do they drive the prime mover?