What is the reason for the squeaking sound when accelerating?

[Matteo]

It may be because the belt is slipping on the generator, causing intense friction and vibration between the belt and the pulley, resulting in a noise at a certain frequency. Here are the relevant explanations: 1. Throttle: The throttle, also known as the "air valve" or "butterfly valve," refers to the control device that regulates the engine's power (thrust). In piston-type aircraft engines, the throttle controls the opening of the carburetor's butterfly valve to regulate the cylinder's filling volume, thereby determining the engine's output power. 2. Timing Belt: The timing belt is an important component of the engine's valve system. By connecting to the crankshaft and maintaining a specific transmission ratio, it ensures the accuracy of the intake and exhaust timing.