Recently, I am trying to sum up the blade 1,2,3 out-of-plane moments using FAST. The results suggest me that the sum of the blade out-of-plane moments tends to a constant, and has a prefered constant angle (in a stationaty coordinate system). Is this result reasonable? If yes, is the fact caused by the teeter? Or I had some bug in my proceedure, which is the following:
Where M1, M2, M3 are Blade 1, 2, 3 out of plane moments(RootMyc1,RootMyc2,RootMyc3)
A is the Azimuth angle(Azimuth)
I appreciate any discussion and consideration. Thank you.