where:

..\Images\INFO1088_wmf.gif

is the vertical tail sectional lift curve slope at the vertical tail mean geometric chord at zero-Mach and Re = 6.0x10^6.

..\Images\INFO1089_wmf.gif

is the Z-distance between the vertical tail mean geometric chord and the vertical tail root chord in terms of vertical tail span.

..\Images\INFO1090_wmf.gif

is the vertical tail root airfoil lift curve slope.

..\Images\INFO1091_wmf.gif

is the vertical tail tip airfoil lift curve slope.