Originally Posted by
Radix
I think we are starting to confuse two things again, which is yaw about the normal axis, and a change of heading. And I'm not sure they are the same.
Yes, they absolutely *are* the same. That actually is (I believe) the root of the misunderstanding here is that some are failing to recognize turning flight as inherently involving yaw.
Originally Posted by
Radix
Think about the extreme case, an almost 90 deg banked turn. No yaw about the normal axis, but great change of heading.
Uhhh, yeah, I anticipated someone bringing up the absurd case, and addressed it in a previous post. In normal aircraft flying, which is the topic under discussion, how do you think aircraft heading changes, without a rotation about it's yaw axis?
Serious question, and I'd urge you to ponder it a bit. If we don't have a 90 degree banked turn, how can aircraft heading possibly change without rotating around it's yaw axis? I think you'll eventually come to the realization that it can't.
BTW. "normal" just means "at 90 degrees to". All three axes are normal to the other 2.