For our Design Engineering for Physics course we had the task of designing and building a college project that shows a physics principle. We decided on a flywheel that shows the conservation of the angular momentum. In order to achieve this in the best way, we wanted to build a suitcase with a flywheel in it, so that when you turn the wheel and lift the suitcase, you notice yourself preserving the angular momentum.
Wooden plates of different thickness
A heavy wheel with a shaft around which it can move (diameter 38 centimeters)] Pull starter
A long gear for draw starter
A threaded rod (M1