Positive delta-3 is when the delta-3 angle is between 0º and 45º.
Negative delta-3 is when the delta-3 angle is between 45º and 90º.
Delta-3 angle of 0º. ~ Pitch angle is not changed.
Delta-3 angle of 1º to 44º. ~ Pitch angle change is less than flap angle.
Delta-3 angle of 45º. ~ Pitch angle change equals flap angle.
Delta-3 angle between 46º and 89º. ~ Pitch angle change is greater than flap angle.
Edited to clarify explanation.
Last edited by Dave_Jackson; 17th August 2003 at 20:53.