where:

..\Images\INFO1366_wmf.gif

is the ruddervator trim tab deflection angle.

..\Images\INFO1367_wmf.gif

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

..\Images\INFO1368_wmf.gif

is the ruddervator tab gearing ratio.

..\Images\INFO1369_wmf.gif

is the ruddervator deflection angle.