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This page last updated: December 21, 2012 as of December 2016

Rotary Dumper Building instructions


TL;DR : Coal dumpers need an H bridge underneath to raise and lower the clamps. Coal dumpers are made different than the wood chip dumpers as they are shorter - cut off the parts along the scored lines. I added styrene to the top of the coal cars so they can be used and have locomotives drive though instead of doing the motorized H bridge and cutting the height - they are shorter than wood chip dumpers - to fit the coal gondolas. Superglue something that has a hex screw in it to the plastic gear so the gear can be easily repositioned. Stretch out the springs so they are 'stronger' and hold the coal cars upside down.

Rotary-dumper-2010jan16