Given that the rotor of your single-shaft turbine engine-powered helicopter usually begins to turn automatically at approximately 50% engine RPM (N2), but today the rotor engages earlier at 35% N2, which component of the helicopter drive system is likely causing this issue?
Refer to figures.
The clutch mainly facilitates the engine's starting with minimal inertial loading, ensuring that the gearbox engages only after reaching a certain RPM.
The clutch is located between the engine and the main transmission.
It operates within an oil environment, which is essential for cooling and proper functioning. It consists of a set of shoes that connect to a drum casing and are driven by the engine.
Centrifugal force keeps the shoes engaged with the drum, enabling power transmission.
As a result, the engine experiences reduced load during the startup process, apart from driving the standard components such as generators and pumps.
More specifically, the centrifugal clutch operates automatically and becomes more effective as the speed increases.
Therefore, the correct answer is "Clutch."
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