B of Drag Polar in Landing Configuration with Gear Down

The aircraft drag polar is expressed as:

..\Images\INFO0227_wmf.gif

For parabolic drag polars:

..\Images\INFO0228_wmf.gif

where:

..\Images\INFO0229_wmf.gif

is the wing aspect ratio.

..\Images\INFO0230_wmf.gif

is the Oswald's efficiency factor.