Maximum lift to drag coefficient Calculator

The maximum lift-to-drag coefficient, often denoted as (CL/CD)max, is a key performance metric used to assess the aerodynamic efficiency of an aircraft. It represents the highest achievable ratio of the lift coefficient (CL) to the drag coefficient (CD) for a given aircraft configuration, operating condition, and flight regime. 

  • (CL/CD)max is the maximum lift-to-drag ratio
  • e is the Oswald efficiency factor 
  • AR is the aspect ratio of the wing
  • CD,o is the zero-lift drag coefficient

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