How to throw an even more wicked wiffle ball pitch
J Thoendell stashed this in Sports
1. Scratching the smooth surface between the holes creates more turbulence on that side, strengthening the curve. Asymmetry is key, so scuff only the one side.
2. Enlarging the holes or smoothing their edges can increase interior airflow and make it the governing force, causing the ball to break toward the solid side.
3. Covering or deforming select holes can encourage multiple vortices of different magnitudes to form, leading to more dramatic curves.