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A drop tower or big drop is a type of amusement ride incorporating a central structure or tower. Drop towers vary in height, passenger capacity, lift type, and brake type. Many are custom-made, although there are some mass-produced designs. Riders experience free-fall initially, followed by rapid heavy deceleration. With most drop towers, a gondola carrying riders is lifted to the top of a large vertical structure, then released to free-fall down the tower. Brakes activate to slow the gondola as it approaches the bottom of the ride. Some designs expand on this concept with features such as rotating gondolas, or several bounces before coming to rest. Most drop towers require child riders to exceed a minimum height; limits vary widely depending upon the nature of the tower, with a tower for smaller children from tall,〔(Ride with 95cm height requirement )〕 and a tower having a restriction.〔( Ride with 130cm height requirement )〕 Certain drop towers accelerate as they fall, leading to riders being lifted out of their seats. As of July 2014, the longest drop is at Zumanjaro: Drop of Doom at Six Flags Great Adventure, at . A drop tower type of ride is distinct from an observation tower ride. ==Ride designs== Mass-produced tower rides include: * Double Shot (air-powered blast up and down) * The Piledriver * Space Shot (air-powered blast up) * Spring Ride / Family Tower * Super Shot * Turbo Drop (air-powered blast down) * Intamin Drop Tower * Z-Force (Zamperla shot'n'drop tower) * Flash Tower (Zamperla shot'n'drop tower) * Hurakan Condor (Multi-ride with variants) ABC rides also manufacture mini drop towers, especially enclosed dark rides such as 'Drop Dead' at the London Dungeon. 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「Drop tower」の詳細全文を読む スポンサード リンク
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