Difference between revisions of "AY Honors/Ultimate Disc/Answer Key"

Revision as of 21:18, 23 May 2006

A Wham-O Professional Frisbee

Frisbee is the most common name for flying discs, which are generally plastic, roughly 20 to 25 centimeters (8–10 in) in diameter, with a lip. They are designed to fly aerodynamically when thrown with rotation and can be caught by hand. The name Frisbee is a registered trademark of the Wham-O toy company, but the term is often mistakenly used generically to describe all versions of the flying disc.

A wide range of Frisbee (flying Discs) variants are available commercially. Disc golf discs are usually smaller but denser and are tailored for particular flight profiles to increase/decrease stability and distance. When it was discovered that dogs enjoyed chasing and retrieving the slow-moving discs, special discs were designed with more pliable material that would better resist a dog's bite. Disc dog competitions, in which dogs' disc-catching skills are judged, have become quite popular as well. Ring-like discs shaped like a Saturn's ring, known as Aerobies, typically fly significantly farther than any traditional flying disc. The evolution has continued with the advancement of lighting a flying disc for evening and night-time play. By using a Flashflight disc, players can extend the throw and catch playing time after the sun goes down.

History

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, that initial disc was largely unsuccessful. A later model made by Morrison in 1955 and sold as the "Pluto Platter" was bought by Wham-O 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 flying discs

Ultimate
Freestyle frisbee
Disc Golf - the traditional game of Golf played with flying discs (frisbees) instead of clubs and balls.
Durango Boot
Double Disc Court
Flutterguts, also known as Flutter Frisbee
Friskee
Disc dog
Dodge Frisbee
Goaltimate
Schtick
Fricket, also known as Cups
Hot Box
Fris-Nok, the traditional Icelandic-Canadian game.

Physics

The rotating flying disc has angular momentum perpendicular to the horizontal plane, stabilizing the disc's attitude 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.

Even a slight deformation in a disc, called a "taco" as extreme cases look like a taco shell, can cause adverse affects when throwing long range. It can be observed by holding the disc horizontally at eye level and looking at the rim while slowly rotating the disc.

Richard Feynman in his book Surely You're Joking, Mr. Feynman! suggests that watching the wobble of a plate tossed in the Cornell University cafeteria stimulated him to develop mathematics that eventually led to his Nobel prize winning work in quantum electrodynamics [1].

Trivia

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.

External links

cs:Frisbee da:Frisbee de:Frisbee eo:Flugdisko fr:Frisbee it:Frisbee nl:Frisbee ja:フライングディスク no:Frisbee pl:Frisbee sk:Frisbee sv:Frisbee es:Frisbee

@@ Line 1: / Line 1: @@
 [[Image:frisbee-1.jpg|thumb|200px|right|A [[Wham-O]] Professional Frisbee]]
-'''Frisbee''' is the most common name for '''flying discs''', which are generally [[plastic]], roughly 20 to 25 centimeters (8&ndash;10&nbsp;in) in [[diameter]], with a lip. They are designed to fly [[aerodynamic]]ally when thrown with [[rotation]] and can be caught by hand. The name Frisbee is a registered [[trademark]] of the [[Wham-O]] toy company, but the term is often used [[genericized trademark|generically]] to describe all versions of the flying disc.
+'''Frisbee''' is the most common name for '''flying discs''', which are generally [[plastic]], roughly 20 to 25 centimeters (8&ndash;10&nbsp;in) in [[diameter]], with a lip. They are designed to fly [[aerodynamic]]ally when thrown with [[rotation]] and can be caught by hand. The name Frisbee is a registered [[trademark]] of the [[Wham-O]] toy company, but the term is often mistakenly used [[genericized trademark|generically]] to describe all versions of the flying disc.
 A wide range of Frisbee (flying Discs) variants are available commercially. [[Disc golf]] discs are usually smaller but denser and are tailored for particular flight profiles to increase/decrease stability and distance. When it was discovered that [[dog]]s enjoyed chasing and retrieving the slow-moving discs, special discs were designed with more pliable material that would better resist a dog's bite. [[Disc dog]] competitions, in which dogs' disc-catching skills are judged, have become quite popular as well. Ring-like discs shaped like a [[Saturn (planet)|Saturn]]'s ring, known as [[Aerobie]]s, typically fly significantly farther than any traditional flying disc. The evolution has continued with the advancement of lighting a flying disc for evening and night-time play. By using a [[Flashflight]] disc, players can extend the throw and catch playing time after the sun goes down.
@@ Line 7: / Line 7: @@
 ==History==
-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, that initial disc was largely unsuccessful. A later model made by Morrison in [[1955]] and sold as the "Pluto Platter" was bought by Wham-O 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. In 2006 the team called "airbadger" won both the under 17s and under 13s great britain nationals
+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, that initial disc was largely unsuccessful. A later model made by Morrison in [[1955]] and sold as the "Pluto Platter" was bought by Wham-O 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.
-and came 3rd in the under 19's nationals.
 ==Games using flying discs==
@@ Line 31: / Line 30: @@
 The rotating flying disc has [[angular momentum]] perpendicular to the horizontal plane, stabilizing the disc's attitude <!-- "attitude" is the correct term here; pls don't change to "altitude". -elf Dec 05 --> 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 (force)|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.
-A slight deformation in a frisbee, called "taco", can cause adverse affects when throwing long range. It can be measured by looking at it from eye level. The heavier the frisbee, the more adverse the effects, because it distorts the entire wing structure, throwing off the frisbees aerodynamic properties.
+Even a slight deformation in a disc, called a "taco" as extreme cases look like a [[taco shell]], can cause adverse affects when throwing long range. It can be observed by holding the disc horizontally at eye level and looking at the rim while slowly rotating the disc.
 [[Richard Feynman]] in his book ''[[Surely You're Joking, Mr. Feynman!]]'' suggests that watching the wobble of a plate tossed in the [[Cornell University]] cafeteria stimulated him to develop mathematics that eventually led to his Nobel prize winning work in [[quantum electrodynamics]] [http://www.washingtonpost.com/wp-dyn/content/article/2005/11/03/AR2005110301924.html].