Metal Tippe "Flip Over" Top

This spinning top has a surprising behavior. When spun, it will introvert itself to spin upside down until it loses momentum. This interesting gyroscopic effect is generally credited to surface friction. This small friction causes a torque which gradually rotates the sphere on a second axis and forces it up onto the stem. Note the direction of rotation before and after it flips.

This precision tippe top was machined from aluminum to achieve the best effect. It takes a good spin to successfully flip, so have patience if it doesn't happen right away.

(Pictured: Bohr and Pauli investigating a tippe top).

Diameter: 29mm (1.14")
Hieght: 36mm (1.41")