
The second part of the theatre magic is in the fly rails. These thousand pound drops experience a large weight force and have a lot of potential energy being raised about 20 meters up.

To assist with lifting these beautiful drops, we have a combination pulley system assisted by weights. A combination pulley system is comprised of a stationary pulley and a movable pulley, which in this case has weights on it to decrease the weight we are actually pulling. Since there are only one complete set of pulleys, we halve the difference between the weight of the drop and the weight of the weights. The overall force we had to move is supplied by the rope via tension to life the drops in and out.
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This is the magic of the theatre.