alpha_stall(F4, 2); alpha_stall_simp(F4);
    [alpha = 0.4200760848, V = 67.67898414, F = 77043.67704]
    [alpha = 0.4366463528, V = 64.09047259, F = 78880.61477]

.4200760848*radian; 67.67898414/kts;
                          24.06858673
                          131.5574206


alpha_stall_F(F4, 71800, 1, .4);
            [alpha = 0.3969892629, V = 67.98357114]
alpha_stall_F_simp(F4, 71800, .4);
            [alpha = 0.4057441675, V = 64.55155324]



alpha_stall(F16C, 2, .8); alpha_stall_simp(F16C, 2, .8);
    [alpha = 0.7656584558, V = 43.04083512, F = 47827.95134]
    [alpha = 1.195706709, V = 26.56818460, F = 45780.84142]

.7656584553*radian; 43.04083513/kts;
                          43.86899803
                          83.66469034