$2\mathrm{.}2$ Stall and Steady Flight Lines

Begin with the stall lines at the left side of the flight envelope. They come from

$n=\frac{\text{L}\text{i}\text{f}\text{t}}{\text{W}\text{e}\text{i}\text{g}\text{h}\text{t}},$ and $,V_{\text{s}\text{t}\text{a}\text{l}\text{l}}=\sqrt[\phantom{2}]{\frac{2nmg}{S{C}_{L_{\text{m}\text{a}\text{x}}}}}$

Solve for $n$ in terms of the stall speed $V_{\text{s}\text{t}\text{a}\text{l}\text{l}},$ noting you will have two curves, one each for the positive and negative load factor $n$ corresponding to the positive and negative lift coefficients $C_{L_{\text{m}\text{a}\text{x}}}$ and $-C_{L_{\text{m}\text{a}\text{x}}}.$

Find the positive and negative speeds $V_S$ needed for steady, level flight by calculating the speed for $n=1$ and $n=-1($it is acrobatic, so$...$ inverted?$).$

Also find the speed at points $A$&$G$ in the figure, denoted as $V_A$ and $V_G,$ by calculating where the positive and negative stall lines meet the load factor limits$,$ i$.$e$.,n=5\mathrm{.}5$ and $n=-4,$ respectively.

$2\mathrm{.}3$ Plotting Without Gusts

We will make the plot in four steps. Before starting, note the design cruise and dive speeds $V_C$ and $V_D$ from the problem statement since we will use them:

Plot the positive and negative stall lines, $OA$ and $OG$ in the figure.

Plot the maximum positive and negative load factor lines, AD and GF respectively, by simply plotting the positive $n_{\text{m}\text{a}\text{x}}=5\mathrm{.}5$ from $V_A$ to $V_D$ and the negative $n_{\text{m}\text{a}\text{x}}=-4$ from $V_G$ to $V_C.$

Plot the right side of the envelope in two segments: from D straight down to a load factor $n=0$ and a straight line from F to this