Understanding Commercial Airliner Speeds

The speed of commercial airliners has remained unchanged since the 1960s, primarily due to the aerodynamic design of the wings, known as airfoils. These wings are shaped like teardrops, allowing air to flow faster over the top than underneath. However, when planes approach 80% of the speed of sound, the air over the wings breaks the sound barrier, creating shock waves and drag. Overcoming this drag requires excessive fuel, making flights costly. Thus, planes fly at speeds that minimize drag, maintaining the same speed as 60 years ago.

What has been the maximum speed of commercial airliners since the 1960s?

• 850 kilometers per hour

• 1150 kilometers per hour

• 1050 kilometers per hour

• 950 kilometers per hour

What is the shape of an airplane wing called?

• Streamline

• Teardrop

• Aerodynamic

• Airfoil

Why is the airfoil shape important for an airplane?

• It reduces fuel consumption

• It allows the plane to fly faster

• It increases passenger comfort

• It ensures the air moves faster over the top of the wing

What happens when a plane reaches 80% of the speed of sound?

• The plane becomes more fuel-efficient

• The air over the wing breaks the sound barrier

• The plane's speed increases

• The plane can fly higher

Why don't commercial airliners fly faster than they currently do?

• It would be unsafe for passengers

• It would require more advanced technology

• It would make flights too expensive due to fuel costs

• It would require redesigning the wings