When you hit a striped ball with bottom-left english, and the stripe is initially aligned with the english direction, the stripe appears to “flip” during the shot. How does this work?

The following videos demonstrate and explain how the spin axis changes as drag converts bottom spin to forward roll, while sidespin persists:

Check it out and give it a try. It’s a cool visual demo.

---

Dr. Dave keeps this site commercial free, with no ads. If you appreciate the free resources, please consider making a one-time or monthly donation to show your support: