where:

..\Images\INFO0176_wmf.gif

is the aileron trim tab deflection angle.

..\Images\INFO0177_wmf.gif

is the additional aileron tab deflection angle required to trim the aircraft .

..\Images\INFO0178_wmf.gif

is the aileron tab gearing ratio.

..\Images\INFO0179_wmf.gif

is the aileron deflection angle.