Acrophobia (ride)

Acrophobia (ride)

Acrophobia is the name for a free-fall tower ride located at Six Flags Over Georgia in Atlanta. The attraction was designed by Intamin Worldwide of Switzerland, and is marketed by Intamin's Liechtenstein-based subsidiary Ride Trade. When Acrophobia opened to the public in the spring of 2001, it became the first free-fall attraction of its kind in the world.

History

Acrophobia is the latest version in a long-running series of attractions designed by Intamin that create the sensation of free fall. The first free-fall towers were, in essence, vertical drop roller coaster rides, although many coaster fans do not classify them as such. One such example was Six Flags Over Georgia's own Free Fall, which was installed in the park in 1983 and removed in the winter of 2006.

The Giant Drop variant improved upon the original free-fall tower in numerous ways, most noticeably in its braking system. Whereas the first-generation towers used standard friction brakes on a horizontal track section to slow down the descending cabins, the Giant Drop uses rare-earth magnets to gently slow the ride vehicle to a stop at the base of the tower. This innovation provided a fail-safe braking system—no electricity is required to create the magnetic forces—and also allowed for a smaller footprint.

The third-generation Gyro Drop tower kept the key innovations of the Giant Drop and added a new twist, literally. The ride's single round gondola would rotate during its ascent, providing a panoramic view of the surrounding countryside prior to the drop back to the ground.

Attraction design & Ride Experience

Acrophobia is a significant modification to the Gyro Drop model, enough to be marketed as a distinct version, the "Floorless, Tilting Gyro Drop". Instead of being seated on the round ride gondola, riders are fastened into special harnesses that partially resemble large bicycle seats. These harnesses allow the riders' legs to dangle freely, similar to using a parachute; hence, no "floor."

As the ride cycle begins, a winch system grabs the gondola and lifts it upwards. Shortly after, the gondola begins to slowly rotate, completing one revolution before reaching the top of the tower. As it approaches the top of the tower, Acrophobia's second innovation is revealed—hydraulic pistons behind the harnesses tilt them outwards roughly 15 degrees past vertical. The intent is to "force" riders to look down and see how high they are. After a short delay, the winch releases the gondola, allowing it to free-fall back to the ground, where an array of braking systems slows it down and eventually allows it to come to a full stop, thus completing the cycle.

Acrophobia is just over 200 feet in height, as evidenced by the FAA-mandated red hazard beacon at the top of the tower. However, the actual drop height of the ride is approximately 161 feet.

The ride cycle begins as the airgates open to allow the rider on the ride. The guests take their seats on the unit. The harnesses have been painted purple to match the scheme of the ride. They pull down on those purple harnesses (that can be locked at any position) and fasten their safety seat belts beneath them. The seat belts are a part of the failsafe safety system. Attendants enter their chained safety zones and give the all clear signal. The Catcher comes down and winches the gondola and begins the ascent to the top of the tower. Once the gondola reaches the top of the attendants safety zones, the 30 seat unit begins to rotate a full 360 degrees. The catcher reaches the top of the tower and the operator "sings" to the riders to encourage them to forget about the drop. 8 Seconds after the rotation is complete, the gondola drops to the braking system in less than 3.5 seconds.

This ride is an instant thrill among Six Flags Over Georgia guests.

afety systems

Riders are held in place by a combination of safety devices. After a rider is seated on the gondola, they pull down on a dark purple over-the-shoulder harness. This harness is to be fit snugly, yet comfortably, against the torso of the rider, and its design allows it to lock in almost any position. Put another way, the harness does not have a limited number of locking points (like holes on a belt). Once fitted, the rider (or a ride attendant) will fasten a safety belt connecting the seat and the harness, thus closing the restraint around the rider.

Due to the nature of the attraction, Acrophobia requires a number of fail-safe features to protect its riders. The bulk of these features are concentrated at the base of the attraction; foremost among these is the tower's permanent magnet braking system. Using the principles of magnetism, these brakes slow down the falling gondola gently, yet rapidly, without actually contacting the gondola. These magnets do not require electricity to produce their magnetic fields, and as such they are able to function even in the event of a total power failure. Lastly, a set of four hydraulic plungers "catch" the gondola and allow it to settle to the tower base. Like the magnetic brakes, these plungers do not require power to function properly. Acrophobia requires the rider to be at least fifty-two inches tall.


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