Roller Coasters Bring Us Fly Over The Frency

Rollercoasters can trace their origins back to the russian ice slides

. Russian Ice slides, which first appeared in the 1700"s were amusement devices found at fairs all over Russia. A slide consisted of a steep drop made entirely of ice, occasionally a few creative people added a small series of bumps at the end. The rider rode in a sled that was made either of wood or ice, with ice being common. Sand was placed at the end to slow the sleds down. The person sat on a straw patch and held on to a rope tied through a hole drilled in the ice block. These early rides were quite popular, and soon flourished. At this time sliding down the slides was a risky business and required skill on behalf of the rider, so skilled guides made their services available to novice riders for a fee. Nobody knows for certain where the name "roller coaster" came from, but some people believe it came from an early American design where the slides were fitted with rollers over which a flat sled would coast. This design would be similar to the roller conveyor ramps used for moving boxes in shipping warehouses. Of course, roller coasters eventually changed their design to where the wheels were fitted onto the vehicle rather than the ramp. There is an anecdote that the name "roller coaster" originated from a roller skating rink in Haverhill Massachusetts in the late 1880s. At this rink was a ride with a toboggan style sled raised to the top of a track that consisted of hundreds of rollers (like the roller conveyor ramps mentioned above). This so-called Roller Toboggan would roll down gentle hills to the floor. The two men who invented the ride, Stephen E. Jackman and Byron B. Floyd say that they were first to use the term roller coaster, and there is some evidence to back this account up. Early roller coasters were sometimes referred to as switchback gravity railroads, after the gravity powered railroads that were used to haul coal down from high mountain coal seams. The very first roller coaster in America was built as a switchback railway at Coney Island by La Marcus Thompson. It screamed along at 6 mph, and made a lovely tour of the beach at Coney Island. Whether the moniker "roller coaster" came from early gravity powered railroads or from amusement rides based on roller ramps and sleds may never be known. Regardless of the origin of the name, "roller coaster" is a very apt description of the ride. Except for the chain that moves the roller coaster train to the top of the first (largest) hill, the cars only move using their own kinetic energy, with no mechanical or fuel-powered help at all. So, indeed, it coasts on rollers. Perhaps the fact that the name was descriptive even after the switch from wheeled ramps to wheeled cars made it easy for the old term to "stick".As the professional manufacturer of complete sets of mining machinery, such as Shaking concentrator,Classifiers,Sand washing machine, Henan Hongxing is always doing the best in products and service.

by: HXJQ OF CHINA

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