shot with Galaxy SII piperistostoma.blogspot.com A flying disc is a disc-shaped glider that is generally plastic and roughly 20 to 25 cm (7.9 to 9.8 in) in diameter, with a lip.[1] The shape of the disc, an airfoil in cross-section, allows it to fly by generating lift as it moves through the air while rotating. The term frisbee, often used uncapitalized generically to describe all flying discs, is a registered trademark of the Wham-O toy company. Such use is not encouraged by the company, as the use of the name in generic fashion may put the trademark in jeopardy.[2] Flying discs are thrown and caught for free-form recreation and as part of many different flying disc games. A wide range of flying disc variants are available commercially. Disc golf discs are usually smaller but denser and are tailored for particular flight profiles to increase stability and distance. Disc dog sports use relatively slow flying discs made of more pliable material to better resist a dog's bite and prevent injury to the dog. Flying rings are also available, which typically fly significantly farther than any traditional flying disc. There are illuminated discs meant for night time play that use phosphorescent plastic, or battery powered light emitting diodes. There are also discs that whistle when they reach a certain velocity in flight. from en.wikipedia.org
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