Lightning Protection in Composite Materials

The video explains how lightning strikes affect aircraft, particularly focusing on the transition from aluminum to composite materials in modern planes. Aluminum, a good conductor, allows electricity to flow safely, but composites require a metallic mesh for protection. Experiments demonstrate the effectiveness of this mesh in preventing damage from lightning strikes, ensuring the safety of composite planes.

How often does a commercial aircraft typically get struck by lightning?

• Once a day

• Once a week

• Once a year

• Once a month

Why is aluminum considered a good material for handling lightning strikes?

• It is lightweight

• It is easy to mold

• It is a good conductor of electricity

• It is cheap

What is the main challenge with using composite materials in aircraft?

• They are difficult to manufacture

• They are too heavy

• They do not conduct electricity well

• They are too expensive

What solution is used to protect composite materials from lightning?

• A plastic coating

• A metallic mesh

• A thick layer of paint

• A rubber layer

What does the metallic mesh in composite materials act as?

• An inductive shield

• A thermal insulator

• A decorative element

• A weight reducer

What happens to carbon composite materials when struck by lightning without protection?

• They heat up and burn

• They conduct electricity efficiently

• They melt

• They remain unaffected

How conductive are carbon fiber composites compared to aluminum?

• Half as conductive

• 1,000 times less conductive

• Twice as conductive

• Equally conductive

What is the purpose of the lab tests on aircraft materials?

• To test their cost

• To test their effectiveness against lightning

• To test their color

• To test their weight

Where does the lightning current travel after striking an aircraft?

• Through the engines

• Through the windows

• Through the skin

• Through the cabin

What role does the metallic mesh play in composite planes?

• It acts as a lightning rod

• It improves fuel efficiency

• It enhances aerodynamics

• It reduces noise