The Scrambler, Twist (in the UK), Twister, Cha Cha (in Australia), Sizzler, or Merry Mixer is an amusement ride in which suspended riders spinning in cars experience centrifugal force, while spinning along two separate axes. Riders are seated in small carriages clustered together and connected by beams at the top to a central point. The clustered vehicles are spun in one direction, while the ride as a whole spins in the opposite direction. The design has a number of variations.
In , the first scrambler was invented by Richard Harris of Georgia and installed at Lakewood Fairgrounds. Two additional rides were built and sold in the following two years.
In 1941, Harris was granted a U.S. patent for the design, which was then acquired or licensed by the Eli Bridge Company.
In late 1953, the Eli Bridge Company road-tested its Scrambler ride, and sold the first five over the next year, by the end of 1954. The original ride had a total of 12 cars distributed among its three arms with a capacity of 24 adults or 36 children. The entire ride rotated clockwise at 9âÂÂ12 revolutions per minute.
At the 1955 Florida State Fair, The Eli Bridge Scrambler had one of its first major showings, where it grossed US$1,700, at 25 cents a ride, in a single day ( at $ a ride), raising interest among many additional potential buyers.
In 1959, the rides first appeared in the UK, when they were manufactured by Edwin Hall under license from the Eli Bridge Company.
In 1979, rides manufactured by Eli Bridge directly began to be imported.
A grasscutter scrambler has a basic frame shape and no platform and is driven by a lower arm assembly. This type of ride is extremely popular in the United States.
A Sizzler is a ride that has thicker arms and a platform. When this type of ride was first manufactured, the manufacturers concentrated on the ride aesthetics. Concerns have been raised about its safety, however, as Sizzler rides have been involved in at least six fatalities since 1997.
The 'Gee Whizzer' derivative was constructed and commissioned by the operators King Carnival amusements of Tasmania, Australia during the 1950s. The project was carried out by rail engineers who utilized rail and tram parts that were common for the era. This machine is currently the largest and fastest of the variants utilizing a unique fully suspended balanced single sweep arm design, driven from the top resulting in no lower arm assembly. The center support core is fully independent and does not require a support deck; instead, eight extended stabilizers are fitted to the core during assembly. Only one of these machines is known to still be in existence.
A Cyclone, also known as a Lifting Twist, manufactured by ARM UK, has very much the same function and appearance as a normal Sizzler, except that the centre structure begins to lift with the cars once it reaches up to normal speed until it reaches above the fence level, where it remains for the duration of the ride. They are considerably fast when they reach full speed, although they normally slow down first so riders can brace for the full speed. After the full speed part is over, the centre structure begins to lower back to platform level as the ride slows down to a stop. Only three of these Cyclones currently exist in the world.