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An Aerobie is a flying ring used in a manner similar to a flying disc (Frisbee), for recreational catches between two or more individuals. Its ring shape of only about thickness〔("The Science of Aerobie Sport Toys", #1 ), accessed June 26, 2008〕 makes the Aerobie lighter and more stable in flight than a disc.〔Schuurmans, Mace ("Flight of the Frisbee" ), ''New Scientist'', accessed June 26, 2008〕 It can be bent to tune it for straighter flight.〔("Aerobie Pro and Sprint ring FAQs", #2 ), accessed June 26, 2008〕 Since it has very low drag and good stability, it can be thrown much farther than a flying disc. The Aerobie was used to set two former world records for thrown objects. Designed in 1984 by Stanford engineering lecturer Alan Adler, the Aerobie has a polycarbonate core with soft rubber bumpers molded onto the inner and outer rims. The outer rim has a spoiler designed to impart stability.〔(aerobie.com image ), accessed June 26, 2008〕 "Aerobie" also refers to other products made by Aerobie, Inc. ==History== In the 1970s, Alan Adler began attempting to improve the flying disc, considering its design characteristics. He tried streamlining the shape to reduce drag, but this resulted in a disc that was more unstable in flight. Eventually, inspired by British accounts of deadly Indian weaponry and martial arts, he turned his attention to the ring shape of the Chakram, a formidable Punjabi weapon used by the Sikh of India. This led to the development of the predecessor of the Aerobie, which was called the "Skyro". About a million of this model were sold. In 1980, it was used to set a Guinness World Record throw of 261 meters. It lacked the spoiler rim of the Aerobie. It had low drag, but was stable at only a certain speed. The later introduction of the spoiler, which balanced the lift, made the ring stable "over a wide range of speeds".〔Adler, Alan ("The Evolution & Aerodynamics of the Aerobie Flying Ring" ), accessed June 26, 2008〕 After testing several models, the ideal shape was found, and the Aerobie was produced. Adler founded Superflight, Inc. in 1984 (now known as Aerobie, Inc.) Since then, Adler and the company have produced 12 other sport toy products.〔("The History of the Aerobie Brand" ), accessed June 26, 2008 〕 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「Aerobie」の詳細全文を読む スポンサード リンク
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