AY Honors/Ultimate Disc/Answer Key

2005-09-14T19:12:06Z

128.2.203.210: /* Physics */

[[Image:frisbee-1.jpg|thumb|200px|right|A [[Wham-O]] Professional Frisbee]]

While the word '''Frisbee''' is a registered [[trademark]] of the [[Wham-O]] toy company, the term is often used [[genericized trademark|generically]] to describe '''flying discs''' similar to those made by the company. They are generally [[plastic]], roughly 8 to 10 inches (20-25 cm) in [[diameter]], with a lip. They are designed to fly [[aerodynamic]]ally when thrown with [[rotation]] and can be caught by hand.

A wide range of frisbee variants are available commercially. [[Disc golf]] discs are usually smaller but denser and are tailored for particular flight profiles such as stability or distance. When it was discovered that [[dog]]s enjoyed chasing and retrieving the slow-moving discs, special frisbees were designed with more pliable material that would better resist the dog bites. [[Disc dog]] competitions, in which dogs' frisbee-catching skills are judged, have become quite popular as well. Frisbee-like discs shaped like a [[Saturn (planet)|Saturn]]'s ring, known as [[aerobie]]s, typically fly significantly farther than traditional frisbees.

==History==

It is widely accepted that the game of frisbee was loosley based on the discus death matches that were a favorite pastime which Alexander the Great and his men used to unwind in between battles. Eventually other materials like dried circulets of oxen hide were used to fashion the discus to reduce the amount of downtime casualties.

The modern day frisbees are developed from the "Flying-Saucer", originally invented by [[Walter Frederick Morrison]] and codeveloped and financed by [[Warren Franscioni]] in [[1948]]. However, the initial prototype was unsuccessful. A later model made by Morrison in [[1955]] and sold as the "Pluto Platter" was bought by Wham-O in [[1957]]. The first flying discs rolled into production on [[January 13]], [[1957]]. In the next year, Wham-O renamed the toy "Frisbee", a (probably deliberate) misspelling of the name of the [[Frisbie Pie Company]] of [[Bridgeport, Connecticut]], whose [[pie]] tins had been used by [[Yale University]] students in the campus for similar purposes.

==Games using frisbee==

* [[Ultimate frisbee]]
* [[Freestyle frisbee]]
* [[Guts frisbee]]
* [[Disc golf]]
* [[Durango Boot]]
* [[DDC Frisbee]]
* [[Flutterguts]]
* [[Friskee]]
* [[Disc dog|Frisbee dogs]]
* [[Dodge Frisbee]]
* [[Suzy Sticks]]
* [[Goaltimate]]
* [[Schtick (Disc Game)|Schtick]]
* [[Flutter Frisbee]]

==Physics==

The frisbee's rotation creates an [[angular momentum]] perpendicular to the horizontal plane, stabilizing the disc's altitude in high-speed flight. Small ridges near the leading edge act as turbulators, reducing flow separation by forcing the airflow to become [[turbulent]] after it passes over the ridges. Lift is generated in primarily the same way as a traditional asymmetric [[airfoil]], that is, by accelerating upper airflow such that a pressure difference gives rise to a lifting force.

==See also==

*Descriptions of [[Frisbee throws]]
*[[George Carlin#Frisbeetarianism|Frisbeetarianism]]
*In the animated motion picture [[The Secret of NIMH]], the main character's name was changed in post-production from "Frisby" to "Brisby" to avoid potential trademark infringements.

==Further reading==

*''Frisbee, A Practitioner's Manual and Definitive Treatise'' Stancil E.D. Johnson, M.D. Workman Publishing Company, New York (July, 1975) ISBN 0-911104-53-4
*''The Official Frisbee Handbook'' Goldy Norton, Bantam Books, Toronto/New York/London (July, 1972) no ISBN number
*''Frisbee Players' Handbook'' Mark Danna, Dan Poynter, Parachuting Publications, Santa Barbara, California (1978) ISBN 0-015516-19-5
*''Frisbee Sports & Games'' Charles Tips, Dan Roddick, Celestial Arts, Millbrae, California (March 1979) ISBN 0-89087-233-3
*''Frisbee by the Masters'' Charles Tips, Celestial Arts, Millbrae, California (March 1977) ISBN 0-89087-142-6

==External links==

*[http://inventors.about.com/library/weekly/aa980218.htm Frisbee, about.com]
*[http://www.frisbeedisc.com/ Wham-O Frisbee disc website]
*[http://www.ukultimate.com/ UK Ultimate Association]
*[http://www.lookfly.com/ Lookfly: for frisbee equipment]

[[Category:Frisbee]]
[[Category:National Toy Hall of Fame]]
[[Category: Toys]]
[[Category:Yale University]]

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AY Honors/Ultimate Disc/Answer Key