Unloading Open Loads

How do people simulate the unloading of open loads like coal
Do people remove the simulated coal cover, or do they actually dump out material, or what?

Thanks[8)]
Siddharth

I use the molded coal loads from CMI & Accurail; and they are removed when the hopper is spotted at the industry where the coal will be dumped. The coal loads go in a special box for open loads and are recycled when the ‘empty’ hopper car is loaded ‘off stage’. I also have flat car loads that are removeable and they get recycled in a similar fashion.

Jim Bernier

I seem to rember an artical in MR or RMC where a washer was glued to the under side of a coal load so when the car was at its unloading point you could easily remove it with a magnet. I unload scrap loads from my gondolas when the get to the stagging yard.
The trick is to make a car thats heavy enough when empty and is not so heavy when its loaded that they do not cause operating problems.My gondolas are a little light empty but work ok.