MTEXX
Newbie
A right hand back hand (RHBH) throw spins the disc clockwise. An overstable disc will turn and fade left (hyzer).
A right hand thumber (RHT) throw spins the disc clockwise. An overstable disc will turn quickly right (anhyzer)- so much that it often goes inverted and comes back around to make a 360 degree barrel roll.
Likewise, the anti-clockwise tomahawk turns left.
What is going on here?
Here is my theory
Thinking about how rollers prefer to land upside down. I'm GUESSING the CG of the disc is higher in z coordinate (e.g. closer to the top of the flight plate) than the CP. In a vertical orientation, gravity will pull on down on the CG while air holds it up at the CP. This puts a torque on the disc- attempting to roll it right/anhyzer. Precession translates part of the gravitational torque into a pitch up torque. And further, the gravitational roll must be more significant than the assymetric lift and AOA lift forces.
Unfortunately, this theory does not explain why the overhand shot CONTINUES to roll when it assumes a level flight path!!! I don't think that gravitational torque could impart a roll axis momentum- not on a spinning body...
Anyone???
A right hand thumber (RHT) throw spins the disc clockwise. An overstable disc will turn quickly right (anhyzer)- so much that it often goes inverted and comes back around to make a 360 degree barrel roll.
Likewise, the anti-clockwise tomahawk turns left.
What is going on here?
Here is my theory
Thinking about how rollers prefer to land upside down. I'm GUESSING the CG of the disc is higher in z coordinate (e.g. closer to the top of the flight plate) than the CP. In a vertical orientation, gravity will pull on down on the CG while air holds it up at the CP. This puts a torque on the disc- attempting to roll it right/anhyzer. Precession translates part of the gravitational torque into a pitch up torque. And further, the gravitational roll must be more significant than the assymetric lift and AOA lift forces.
Unfortunately, this theory does not explain why the overhand shot CONTINUES to roll when it assumes a level flight path!!! I don't think that gravitational torque could impart a roll axis momentum- not on a spinning body...
Anyone???