In an unpowered glide of an aircraft having weight w, lift L and drag D, how will the equilibrium glide angle will be defined ?
For the un powered glide flight
L=Wcos\theta \\D=Wsin\theta \\\Rightarrow \frac{D}{L} =\frac{Wsin\theta}{Wcos\theta} \\\Rightarrow tan\theta =\frac{D}{L} \\\Rightarrow \theta =tan^{-1}\left ( \frac{D}{L} \right )
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