The Corkscrew Pitch

[PatrickPowers]

You can't get a pitched baseball to follow a corkscrew path. But there could be a contraption that would do this. Have a mechanical ball with an outer shell, an inner shell, and an internal power source. The two shells can rotate in different planes. The internal power source can change the angle between the planes without altering the total angular momentum. A ball curves because of its interaction with the air. That affects only with the outer shell, so the plane of curvature can change. The rate of curving is not that high, so you'd have to launch it off a mountain or fire it from a cannon to get a full corkscrew. Shoot it straight up to get the best visual demonstration.