How is static electricity typically dissipated in an aircraft?

How is static electricity typically dissipated in an aircraft?

• A. By removing all bonding and grounding to prevent shorts.
• B. By bonding and grounding and dissipative paths such as static wicks to the atmosphere.
• C. By isolating electronics from grounding to avoid leakage.
• D. By using insulating coatings on all surfaces.

Answer: (D)

Static electricity on an aircraft is kept from causing interference or sparks by providing a controlled path for charges to leave the airframe. This is done through bonding, grounding, and dissipative paths like static discharge wicks. Bonding ties all conductive parts of the aircraft together so they share a common electrical potential, preventing dangerous voltage differences between components. Grounding, especially on the ground, gives charges a direct path to the earth, helping to bleed them off. In flight, static dischargers (static wicks) provide a deliberate, low-resistance route from the aircraft to the surrounding ionized air, allowing charges to dissipate gradually without building up to arcing levels near sensitive avionics. Using insulating coatings on all surfaces would trap charge rather than remove it, increasing the risk of static buildup and interference. Removing bonding or isolating electronics from grounding would also prevent the necessary discharge paths, leading to higher potential differences and potential issues.

Static electricity on an aircraft is kept from causing interference or sparks by providing a controlled path for charges to leave the airframe. This is done through bonding, grounding, and dissipative paths like static discharge wicks. Bonding ties all conductive parts of the aircraft together so they share a common electrical potential, preventing dangerous voltage differences between components. Grounding, especially on the ground, gives charges a direct path to the earth, helping to bleed them off. In flight, static dischargers (static wicks) provide a deliberate, low-resistance route from the aircraft to the surrounding ionized air, allowing charges to dissipate gradually without building up to arcing levels near sensitive avionics.

Using insulating coatings on all surfaces would trap charge rather than remove it, increasing the risk of static buildup and interference. Removing bonding or isolating electronics from grounding would also prevent the necessary discharge paths, leading to higher potential differences and potential issues.