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Zero-g stall

A zero-g stall is a roller coaster inversion.

While travelling uphill, the track rotates 180 degrees - fully inverting riders. The track then levels out and while travelling downwards, the track rotates 180 degrees again but in the opposite direction.

The element has been featured on four roller coasters, all built by Rocky Mountain Construction:

The first all-steel roller coaster with a zero-g stall, Steel Curtain at Kennywood, will open in 2019.

Similar inversions[edit | edit source]

The top gun stall is very similar to the zero-g stall, the only difference being that the track twists in the same direction during the entrance and the exit of the element.