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The aspect ratio A of the wing is the ratio of the area of a square whose side is the span b to the actual planform area of the wing, denoted by S:

$\mathrm{Α}=\frac{{b}^{2}}{S}$ (7.128)

(7.128)

The Mach number enters Eqn (7.127) through the subsonic form of the Prandtl–Glauert factor

$\beta =\sqrt{1-{M}^{2}}$ (7.129)

(7.129)

If the ...

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