Transmission demonstration kit

description

The device demonstrates gear transmissions: number of turns inversely proportional to the diameter of the wheels (or the number of teeth in the wheel).

A student may grasp the wheel and force the rotation of the compound against the resistance of another student, who is holding another wheel. In this way, the experimenters will feel the peripheral power ratios, relative to the locomotives of the different wheels.

A ruler, attached to each of the wheels, can create a variable mechanical advantage in holding the ruler at different and measured points along its length. One student will grasp the ruler, which is attached, for example, to the small wheel, and another student will try to stop the rotation of the compound on the big wheel. The ruler holder will be able to overcome the braking of the rotation of the system despite the ratio of the diameters, which gives an advantage in force to the braking student.

Diverse demonstration options can be illustrated by combining subsystems (two gears and three), each with its own mechanical advantage.