The unit is designed to study the performance of different types of governors. Governor is a device that is used to maintain a constant mean speed of rotation.The apparatus consists of three different types of governors.
1. Porter governor
2. Proell governor
3. Hartnell governor
The load can be changed on governors by placing or removing weights in case of porter and proell governors. But for hartnell governor, load is changed by altering the stress on spring. The rotational speed of the governor is controlled via a speed control knob.