PROBLEMS

$231$

$7\mathrm{.}2$ An aircraft is flying at $20,000ft$ at $M=0\mathrm{.}5.$ The aircraft is banked into a $180$ turn, which is supposed to take $29\mathrm{.}24$ seconds to complete.

Assume $C_L=$ constant

$T_a=6,200lb$

$W=26,000lb$

$n_1=7\mathrm{.}5$

$S=375f{t}^2$

$C_D=0\mathrm{.}015+0\mathrm{.}1055C_L^2$

$C_{L_{\text{m}\text{a}\text{x}}}=1\mathrm{.}6$

Calculate the turn radius and show why this turn $($can$/$cannot$)$ be made.

Ans: $R=8,763ft$; cannot, since $D>T_a.$