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'' A wooden roller coaster is most often classified as a roller coaster with running rails made of flattened steel strips mounted on laminated wooden track. Occasionally, the support structure may be made out of a steel lattice or truss, but the ride remains classified as a wooden roller coaster due to the track design. Because of the limits of wood, wooden roller coasters in general do not have inversions (when the coaster goes upside down), steep drops, or extremely banked turns (overbanked turns). However, there are exceptions; the defunct Son of Beast at Kings Island had a drop and originally had a loop until the end of the 2006 season, although the loop had metal supports. Other special cases are Hades 360 at Mount Olympus Water and Theme Park in Wisconsin Dells, Wisconsin, featuring a double-track tunnel, a Corkscrew, and a 90-degree banked turn, The Voyage at Holiday World (an example of a wooden roller coaster with a steel structure for supports) featuring three separate 90-degree banked turns, Ravine Flyer II at Waldameer Park which has a 90-degree banked turn, T Express at Everland in South Korea with a 77-degree drop, and Outlaw Run at Silver Dollar City which has 3 inversions and 120-degree overbanked turn. == Decline and revival == Once a staple in virtually every amusement park in America, wooden roller coasters began a slow decline in popularity for a number of reasons. Steel roller coasters, while having larger up-front costs, cost much less in ongoing maintenance fees throughout the years of operation. Wooden roller coasters, on the other hand, require large amounts of devoted funds annually to keep the ride in operating condition through regular re-tracking, track lubrication, and support maintenance. Wooden coasters are also becoming less marketable in today's media-driven advertising world. Superlative advertising in which the "biggest", "tallest", or "fastest" ride is what brings in crowds often cannot apply to new wooden roller coasters, especially since a large majority of record-holding rides are steel. Amusement parks are always looking to add attractions that can be presented in commercials and ads as incredibly tall, fast, or extreme, which eliminates many wooden roller coasters. However, the arrival of several new wooden coasters has bucked the downward trend. In 2006, a trio of giant wooden coasters opened in the United States: The Kentucky Rumbler at Beech Bend Park, The Voyage at Holiday World, and El Toro at Six Flags Great Adventure. Another wooden coaster, Renegade at Valleyfair, opened in 2007. In Sweden Balder opened in 2003 and has received much attention and appreciation. It remains to be seen whether or not these new coasters mark the beginning of a wooden coaster revival, but they do indicate that amusement parks continue to show interest in wooden roller coasters. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「wooden roller coaster」の詳細全文を読む スポンサード リンク
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