The background shows the train going through the Zero-g Roll, but the foreground shows a few details about the lift hill that I would like to point out. For example, the running rails are painted to match the purple color on the track's spine. A lot of older inverted coasters didn't paint their rails. Right above the rail is the saw-tooth pattern of the anti-rollback device.
On the lower left corner of the picture is part of the device that keeps tension on the chain used to lift the cars up the first hill. A bunch of heavy weights, which are painted purple to match the rest of the ride, are hanging under two gears. As the coaster train comes on and off the chain lift, the weights moves slightly up and down in order to control the tension on the chain lift. Since a fully loaded train can weigh over 30,000 pounds, it is important to have the appropriate loads on the chain to keep it taught.
©2014 by Joel A. Rogers