I am making a flight sim and would like some help. If I am correct, the angle of attack on the horizontal stabilizer should look something like this:
aoa(Hstab) = aoa(Wing) - downwash + Hstab incidence
From research, the AOA of the Hstab should be negative most of the time, however, that just doesn't seem to happen. For example, if the plane is flying at an AOA of 8 degrees, the downwash won't be more than 3 or 4 degrees, and the horizontal stabilizer incidence won't be less than -1 or -2 degrees. So how is the aoa of the Hstab ever negative, if 8 - 4 - 2 is positive?