Monday 8 November 2010

Rollercoaster

The roller coaster hesitates for a split second at the peak of its steep track after a long, slow climb. You know what's about to happen — and there's no way to avoid it now. It's time to hang onto the handrail, palms sweating, heart racing, and brace yourself for the wild ride down.

http://kidshealth.org/teen/your_mind/mental_health/phobias.html





http://www.youtube.com/watch?v=OvGG--Vtm78&feature=related

TYPES OF ROLLERCOASTERS

Today, there are two main types of roller coaster:

Steel roller coasters

Wooden roller coasters

Steel coasters are known for their smooth ride and often convoluted shapes that frequently turn riders upside-down via inversions. Wooden coasters are typically renowned by enthusiasts for their rougher ride and "air time" produced by negative G-forces when the train reaches the top of hills along the ride. There are also hybrid roller coasters that combine a steel structure with wood tracks, or a wood structure with steel tracks.

Modern roller coasters take on many different forms. Some designs take their cue from how the rider is positioned to experience the ride. Traditionally, riders sit facing forward in the coaster car, while newer coaster designs have ignored this tradition in the quest for building more exciting, unique ride experiences. Variations such as the stand-up roller coaster and the flying roller coaster position the rider in different ways to provide different experiences. Stand-up coasters involve cars that have the riders in a standing position (though still heavily strapped in). Flying coasters have the riders hanging below the track face-down with their chests and feet strapped in. Vekoma "Flying Dutchman" coasters have the riders starting out sitting above the track, then they fully recline so that the riders are looking at the sky. Eventually, they twist into the "flying" position. B&M flying coasters have the riders hanging below the track like in an inverted (hanging) coaster. To go into the flight position, the section of the car where the riders' feet are raised to the track. That way, they start in the flight position. In addition to changing rider viewpoint, some roller coaster designs also focus on track styles to make the ride fresh and different from other coasters.

http://en.wikipedia.org/wiki/Roller_coaster


TECHNOLOGY

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