Quote:
Originally Posted by joetapley  If an arrow spins too fast it will start to spiral in flight (gyro effect). Some people have reported this occuring with Elite spinwings. The spin rate of an arrow overall increases during the flight. If the spin rate goes too high (at the longer distances if at all) the arrow will start corkscrewing.
By going up in fletching size you are increasing the drag torque on the arrow. This allows for a higher spin rate without the gyro effect becoming significant. |
Hmmm. We have some interesting interpretations of physics here.
The spin rate of an arrow increases during the flight?
Interesting. So with the speed of the arrow falling off and the total energy of the arrow rapidly decreasing and the spin rate of the arrow overwhelmingly related to speed, where does this mysterious energy come from to increase the spin rate?
As for "drag torque", et al, you first need to understand the balances and interactions between tail volume coefficients, FOC, aerodynamic loads, stability margins and energy retained in the arrow before you can start pulling out some amazing blanket rule which covers all things.
Beware the folklore around any activity that has been around a long time.