The Oswald Efficiency Factor (e) is a dimensionless parameter in aerodynamics representing a wing’s efficiency in minimizing induced drag. It quantifies how closely the wing’s lift distribution approaches the ideal elliptical distribution. A higher Oswald Efficiency Factor indicates a more efficient wing in terms of lift generation with lower induced drag, with values typically ranging from 0 to 1. The formula to calculate Oswald Efficiency Factor as follows:
Where:
- e is the Oswald Efficiency Factor.
- AR is the Aspect ratio.