Floorless roller coaster
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The floorless roller coaster is a fairly new concept brought forth by legendary coaster manufacturers, Bolliger & Mabillard. The first ever floorless coaster debuted in 1999 at Six Flags Great Adventure in Jackson, New Jersey. The coaster, Medusa, opened to great reviews and continues to earn its place on the Amusement Today Top 50 Steel Coasters list.
[edit] Design
As of 2007, only Bolliger & Mabillard, who invented the concept, are in the business of designing and manufacturing floorless coasters. Their designs employ a multi-inversion layout (usually four-seven) and high capacity (often two-three trains). These roller coasters are becoming more common with each passing year, ranging in heights of eighty feet or so, up to 168 feet. These coasters are known for their smooth rides, excellent reliability and usually high cost.