Lift-to-drag ratio
Videos
In aerodynamics, the lift-to-drag ratio is the lift generated by an aerodynamic body such as an aerofoil or aircraft, divided by the aerodynamic drag caused by moving through air. It describes the aer
Drag vs Speed. L/DMAX occurs at minimum Total Drag (e.g. Parasite plus Induced)
Coefficients of drag CD and lift CL vs angle of attack.
The eta has the best glide ratio for a sailplane
Aspect ratio (aeronautics)
Videos
In aeronautics, the aspect ratio of a wing is a measure of its length relative to its width. Mathematically, it is defined as the square of the wingspan divided by the wing area. For wings of constant
Lift-to-drag ratio
…drag associated with creating a lifting force. It depends principally on the lift and drag coefficients, angle of attack to the airflow and the wing aspect ratio. The L/D ratio is inversely proportional to the energy required for a given flightpath, so that doubling the L/D ratio will require only half of the…
An ASH 31 glider with very high aspect ratio (AR=33.5) and lift-to-drag ratio (L/D=56)
Extremely high aspect ratio wing (AR=51.33) of the Eta motor glider providing a L/D ratio of 70
High aspect ratio wing (AR=12.8) of the Bombardier Dash 8 Q400
Moderate aspect ratio wing (AR=5.6) of a Piper PA-28 Cherokee