Induced Drag Coefficient | Glenn Research Center | NASA
Jul 27, 2023 · Lifting line theory shows that the optimum (lowest) induced drag occurs for an elliptic distribution of lift from tip to tip. The efficiency factor e is equal to 1.0 for an elliptic distribution and is some value less than 1.0 for any other lift distribution.
Lift-to-drag ratio - Wikipedia
In aerodynamics, the lift-to-drag ratio (or L/D 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 aerodynamic efficiency under given flight conditions.
Lift-induced drag - Wikipedia
Lift-induced drag, induced drag, vortex drag, or sometimes drag due to lift, in aerodynamics, is an aerodynamic drag force that occurs whenever a moving object redirects the airflow coming at it.
Lift to Drag Ratio | Glenn Research Center | NASA
Jul 19, 2024 · Because lift and drag are both aerodynamic forces, we can think of the L/D ratio as an aerodynamic efficiency factor for the aircraft. Designers of gliders and designers of cruising aircraft want a high L/D ratio to maximize the distance which an aircraft can fly.
Oswald efficiency number - Wikipedia
The Oswald efficiency, similar to the span efficiency, is a correction factor that represents the change in drag with lift of a three-dimensional wing or airplane, as compared with an ideal wing having the same aspect ratio and an elliptical lift distribution.
lift, and the value of the Oswald efficiency factor, E, in Eq.(5-1) is defined as a function of the lift coefficient and Mach number: E = E(C L,M). The drag also depends on the throttle setting, but that effect is usually included in the thrust table, as discussed below. There is another drag polar approximation that is seen often.
Modern Drag Equation | Glenn Research Center | NASA
Jan 21, 2023 · The efficiency factor (e) is equal to 1.0 for an elliptic distribution and is some value less than 1.0 for any other lift distribution. For a rectangular planform, like the Wright brothers wings, e = .7 .
Estimation of Lift Coefficient Prof. Rajkumar S. Pant Aerospace Engineering Department IIT Bombay
Aerodynamics of Finite Wings – Introduction to Aerospace ...
Consider a finite wing with an aspect ratio of 7.2 and a spanwise efficiency factor . The wing comprises an airfoil with a two-dimensional lift-curve slope of 0.10 per degree. Calculate the lift-curve slope of the finite wing.
The Drag Coefficient - NASA
Lifting line theory shows that the optimum (lowest) induced drag occurs for an elliptic distribution of lift from tip to tip. The efficiency factor (e) is equal to 1.0 for an elliptic distribution and is some value less than 1.0 for any other lift distribution.