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What is the purpose of static dischargers on aircraft?

  • A

    To ensure grounding during refueling.

  • B

    To discharge static electricity during flight.

  • C

    To eliminate electrical interference during heavy radio traffic.

  • D

    To improve radio transmission quality at high altitudes.

Refer to figures.
The static dischargers are placed on the aircraft structure to minimize static accumulation on the airframe.

Because static build-up may also affect the onboard radio communication and navigation systems, fitting the static dischargers to the trailing edge of the aircraft control surfaces, the THS wingtips or blade tips, will significantly reduce the risk of interference by dissipating the electrical energy into the atmosphere.

Another important function of static dischargers is limiting the risk of transferring electrical charges between the aircraft and electrified clouds. Dissipation by static dischargers is a key safety measure.

It is worth mentioning that they are usually barbed antennas, small wire brushes, or straight metal wicks.

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