where:

..\Images\INFO0935_wmf.gif

is the vertical tail aspect ratio

..\Images\INFO0936_wmf.gif

is the ratio of the vertical tail aspect ratio in the presence of the fuselage to that of an isolated vertical tail. This ratio is determined from Figure 10.14 of Part VI

..\Images\INFO0937_wmf.gif

is the ratio of the vertical tail aspect ratio in the presence of the horizontal tail and the fuselage to that in the presence of the fuselage alone. This ratio is determined from Figure 10.15 of Part VI.

..\Images\INFO0938_wmf.gif

accounts for relative size of the horizontal and vertical tails and is determined from Figure 10.16 of Part VI.