What term describes the amount of lift generated by a wing or airfoil relative to its drag, indicating airfoil efficiency?

What term describes the amount of lift generated by a wing or airfoil relative to its drag, indicating airfoil efficiency?

• A. Lift/Drag Ratio
• B. Airfoil Efficiency
• C. Aerodynamic Efficiency
• D. Lift Coefficient

Answer: (A)

The lift-to-drag ratio is the measure of how efficiently a wing generates lift relative to the drag it creates. It captures airfoil efficiency because a higher ratio means more lift for every unit of drag, which translates to better performance with less energy loss. In flight, a high L/D allows longer range or higher altitude for a given amount of thrust or power, since you’re producing useful lift while minimizing drag penalties. The lift coefficient tells you how much lift you get for a given dynamic pressure and wing area, but it doesn’t express the trade-off with drag. Airfoil efficiency is related, but the precise term describing lift relative to drag is the lift-to-drag ratio.

The lift-to-drag ratio is the measure of how efficiently a wing generates lift relative to the drag it creates. It captures airfoil efficiency because a higher ratio means more lift for every unit of drag, which translates to better performance with less energy loss. In flight, a high L/D allows longer range or higher altitude for a given amount of thrust or power, since you’re producing useful lift while minimizing drag penalties. The lift coefficient tells you how much lift you get for a given dynamic pressure and wing area, but it doesn’t express the trade-off with drag. Airfoil efficiency is related, but the precise term describing lift relative to drag is the lift-to-drag ratio.