What is the major advantage of a hydraulic mechanical governor compared to a simple mechanical governor system?

The major advantage of a hydraulic mechanical governor compared to a simple mechanical governor system lies in its ability to reduce mechanical losses significantly. Hydraulic governors operate using fluid dynamics to control the speed and power output of engines or turbines, which allows for smoother and more precise adjustments. By using hydraulic fluid, these systems can transmit force more efficiently than purely mechanical systems, which rely on gears and linkages that can introduce friction and other losses.

This reduction in mechanical losses contributes to improved response times and overall efficiency of the governor system, allowing it to maintain more consistent control over the engine or turbine's performance. In contrast, simple mechanical governors, which often include spring and weight mechanisms, can be more susceptible to wear and friction, leading to less accurate regulation of speed.

While hydraulic governors do introduce some complexity and higher costs due to their fluid systems and additional components, these drawbacks are often outweighed by the benefits of reduced mechanical losses and enhanced operational performance, making the hydraulic mechanical governor advantageous in many engineering applications.