Plot $e_{\text{d}\text{h}\text{a}\text{l}}$ versus $$ for $0\mathrm{.}10\mathrm{.}9$ assuming $T_3=9T_1.$ Plot two curves on the

same graph, for $r=10$ and $20.$ What do the curves verify concerning cycle

efficiency and departure from heat input at a constant volume? The fuel cutoff

ratio can be calculated with,

$r_{co}=\frac{u+1}{u+\frac{T1}{Ta}{r}^{(k-1)}},$ where, $u=k(\frac{1}{}-1)$ for $>0$