This interactive and animated coaling tower is based on one on the Boston & Maine Railroad
located in North Walpole, NH. This has two animated hoppers to transfer coal from the input
chute to the top of the bin. They are continuously animated since many trips would be required
to process the coal from even a 40 foot hopper. Bucket speed can be changed by changing the
value in the animated-loop-speed line in the config files mesh table.