What is the reason for the buzzing sound when stepping on the accelerator?

[NevaehAnn]

The reason for the buzzing sound when stepping on the accelerator is an inappropriate gear position, and it is necessary to downshift to increase speed. The accelerator, also known as the throttle or air valve, is a control device that regulates the engine's power (thrust). In piston-type aircraft engines, the throttle controls the opening of the carburetor's throttle valve to adjust the cylinder's filling volume, thereby determining the engine's output power. In gas turbine engines, the throttle regulates the metered fuel flow of the fuel regulator, thus determining the thrust generated by the engine. The throttle position is controlled by the pilot in the cockpit through the throttle lever, which is transmitted to the carburetor or fuel regulator on the engine via control system components such as pushrods, rocker arms, torque tubes, cables, pulleys, and sector gears.