Airtime Hill

An airtime hill (also called a camelback) is a rise-and-fall element specifically engineered to produce negative G-forces — the sensation of floating or being ejected from the seat. The hill profile follows a parabolic trajectory that keeps the train in what engineers call a 'free-fall arc', maximising the duration and intensity of the negative-G phase. Floater airtime hills produce mild, comfortable floating; ejector airtime hills are shaped more aggressively and produce intense, seat-leaving sensations where the lap bar is genuinely the only restraint between the rider and the sky.

Steel coasters use precisely machined parabolic profiles for consistent, repeatable airtime on every run. Wooden coasters produce more varied airtime due to track flex and the natural irregularities of wood construction. The quality and quantity of airtime hills is one of the most important variables in enthusiast rankings of coasters — hyper coasters like Shambhala at PortAventura, Goliath at Walibi Holland, and Silver Star at Europa-Park are celebrated primarily for their sustained sequences of powerful airtime hills.