River rafting ride

A river rafting ride (also commonly referred to as a "river rapids ride") is an amusement ride that simulates whitewater rafting.

History

The river rapids ride concept was proposed by Bill Crandall (General Manager of AstroWorld in Houston) and developed by Intamin. AstroWorld introduced the world's first rapids ride, "Thunder River", in 1980 and popularized a concept which can now be found at most major amusement parks. Despite being an incredibly popular attraction, AstroWorld's "Thunder River" (being a prototype) was initially plagued by issues that were corrected in the first few seasons of operation. The boat bumpers were re-designed, portions of the wide river channel were narrowed or barricaded to prevent boats from bottle-necking or getting caught in a backflow, and a planned whirlpool-effect was scrapped.

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Construction

Many modern rapids rides feature a much narrower river channel as well as smaller (6-seats as opposed to 12-seats) boats. Some are heavily themed while others may present a natural setting for added realism. Multiple manufacturers have introduced new elements to the rapids ride concept: a vertical lift system, shoot the chute-style drops, and a unique whirlpool feature.

River rapids rides feature circular rafts with two main components: the fiberglass body in which passengers are seated and the rubber ring upon which the body is secured. The rubber ring provides buoyancy as well as shock absorption for when rafts collide with an obstacle during the course of the ride. Most rafts hold between six and twelve passengers, seated in groups of two or three depending on the manufacturer of the ride. Riders face toward center of the boat and are usually secured by a lap belt. Some rafts feature a circular metal bar in the middle of the raft; this gives passengers a place to grip or brace their feet. The floor of the raft body is generally above water level to allow drainage. Most parks require riders to be 36 inches or taller. Some rapids rides such as Thunder Canyon at Cedar Point, drain the ride every night after closing and put new water in it the next morning.

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Ride layout

The Thunder River Rapids Ride drained for maintenance shows the system that allows the rapids to be generated.

After leaving the station, the raft will enter relatively calm waters. After travelling a safe distance (usually 5–15 metres), the raft will enter more turbulent waters. Usually rapids are made by the amusement park having large cylinder tubes underneath the water. The bigger the tube, the bigger the rapids. Along with the rapids, there are often waterfalls.

Finally, there may be pressurized water jets. An automated system will spray gushes of water through a tube, or spray gun at the raft as it passes by. Some parks (for instance, Busch Gardens Tampa Bay), have quarter-operated squirt guns so that passersby can shoot at riders.

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Partial list of river rapids rides

Americas

Eurasia

Oceania

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Last modified on 10 April 2013, at 17:59