Twirly Whirly Moment of Inertia Demos

Summary

These are variations of a toy sometimes called a Twirly Whirly. Each one has its own moment of inertia based on geometry. The infill can be changed to adjust the weight of each twirly whirly. When they are spun up, the different moments of inertia become apparent to the user.

Post-Printing

After the ring, disc, or wheel is printed, thread string through the part and attach handles to either side of the part as desired.