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Aviation Dictionary

Lift/drag ratio (L/D)

The efficiency of an airfoil section. It is the ratio of the coefficient of lift to the coefficient of drag for any given angle of attack.

Dictionary Term

Lift/drag ratio (L/D)

Definition

  • The efficiency of an airfoil section. It is the ratio of the coefficient of lift to the coefficient of drag for any given angle of attack.

References

  • Airplane Flying Handbook · Federal Aviation Administration · 2021