What is the handwheel used to adjust the turbine speed on the governor called?

The handwheel used to adjust the turbine speed on the governor is called the Speeder. This device is integral to the operation of a governor in a turbine system, allowing an operator to manipulate the fuel supply and thereby control the speed of the turbine.

When an operator turns the handwheel, they are directly influencing the position of the fuel valves, which alters the energy input into the turbine and modulates its speed. This is crucial in maintaining efficient and safe operation, as it ensures the turbine runs at the desired velocity, adapting to varying load conditions and preventing overspeed situations.

In contrast, a throttle typically refers to a mechanism that controls the flow of fluid, specifically in the context of an engine or turbine where it regulates the amount of fuel or steam entering the system, but it is not synonymous with the specific handwheel for speed adjustment. The term "regulator" may imply a broader function associated with maintaining certain conditions, and while "governor" refers to the entire control system rather than a specific adjustment mechanism. Hence, "Speeder" accurately describes the tool specifically used for speed adjustment on the governor.