You got it bass ackwards Servo tab moves in the opposite direction of the rudder to help hold it in trim.Bill Totten (5-Zero-Three-701-61-Seven-Eight) is our PRA Chapter prez in Portland, Or.
He has SparrowHawk digitized manuals for the different SH versions made by AAG.
He is freely willing to share his knowledge & to email anyone a copy of them.
He owns a SparrowHawk & has been changing it's instrument panel & throttle set-up since he purchased it used out of Arizona. He also converted the AAG tall tail to one of the Sport Copter SC2 triple tails like another chapter member did to his SH a few years back. That SH now is owned by one of our forum members in NM.
Yesterday Bill told me in a phone call that the AAG tall tail is set straight onto the prop airflow (no offset). The rudder tab @ the bottom turns in the opposite direction as what the rudder does when the pilot presses a rudder pedal. Sounds identical to the way the Dominator gyroplanes rudders work.
His email: [email protected]