This collectable Ultimate Frisbee Disc is part of the Original Frisbee Disc 50th Anniversary celebration and is even a limited edition model. Ultimate Frisbee is an action packed sport that is played all over the world. The Original Frisbee Disc has been used for casual pick up games, as well as World Championship Competitions. This Frisbee is the official UPA (Ultimate Players Association) competition Frisbee that weights the approved 175g. The Disc has been designed specifically for Ultimate Player’s needs. Also included is a special insert that breaks down the basic rules of ultimate Frisbee.
A Frisbee disc can also be used as a valuable tool in teaching some basic physics principles. For instance, 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. 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.
The rotating flying disc has a vertical angular momentum vector, stabilizing its attitude gyroscopically. Depending on the cross-sectional shape of the airfoil, the amount of lift generated by the front and back parts of the disc may be unequal. If the disc were not spinning, this would tend to make it pitch. When the disc is spinning, however, such a torque would cause it to precess about the roll axis, causing its trajectory to curve to the left or the right. Most discs are designed to be aerodynamically stable, so that this roll is self-correcting for a fairly broad range of velocities and rates of spin.
For more information on the physics of Frisbees visit Wikipedia. http://en.wikipedia.org/wiki/Frisbee#Physics

Box Size: 14.00in (35.56cm) x 2.50in (6.35cm) x 1.00in (2.54cm)

Recommended for ages 5 and older.

Weight: 0 lb 14 oz ( 0.40 kg )