Innova says this about the Birdie: "The Birdie is a slow, straight flyer with our Thumtrac™ grip for a sure release. It has great chain catching ability. Great for approach shots, as it flies straight and slow, start to finish. It is one of our best “go for it” discs as it doesn’t go far past the basket on misses, and stays put when it hits the ground. A good disc for those players making the conversion from flat edged disc sports: Catch, Ultimate, Freestyle, etc."
The velocity required to reach a disc's optimal flight path. Range: 1 to 15.
The measure of lift generated by a disc to stay aloft. Range: 1 to 7.
The velocity, relative to the speed of the disc, required to cause the disc to turn with the direction of spin. Range: +1 to -5.
The low-velocity stability that causes a disc to hook at the end of its flight. Range: 0 to 5.
PDGA Disc Specifications
Phases of Flight
|As the disc slows and spin decreases, the disc pulls out of turn and begins to hook at the end of flight|
|The aerodynamic profile turns the disc with the direction of spin during the high-speed phase of flight|
|The initial thrust forward during the high-speed phase of flight|