iaf_22
Let me put it together. Beta is designed for TO, GA situations when speeds are low and thrust is TOGA to give you optimum performance during the initial climb out. It basically takes out all the theory and calculations. If you centre beta target and maintain the heading by using lateral control all requirements are met. Now how does beta work in the situations you mentioned? With OEI flying level beta is active till Conf3 and you won't have flaps full till descent. During drift down you have MCT which is much less than TOGA at lower altitudes and your IAS is much higher than take off GA making the controls more effective so spoiler deflections is not an issue which is the main reason for existence of beta. Even after TO or GA after acceleration to GD speed and thrust reduced to MCT beta disappears as it is not required.
Last edited by vilas; 28th May 2014 at 14:48.