What is the function of the AGB in the transmission system?

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The function of the Accessory Gearbox (AGB) in the transmission system is primarily to facilitate input power transfer. The AGB serves as a crucial component that connects the engine to various accessories and systems within the helicopter, including the rotor head and other drive components. It takes the engine's output and distributes it to these accessories, allowing them to operate effectively.

In this context, the AGB ensures that the correct amount of power is transmitted to the necessary systems, maintaining operational integrity and efficiency of the helicopter's overall performance. This central role in power management distinguishes it from other functions such as gear reduction, oil circulation, or output drive direction, which are handled by different components within the helicopter's system.