Errm. You may have glazed over, but I'm still interested.
The question was "Is phase lag not the same as gyroscopic precession". I can think of a couple of ways of making that question more accessible. First we can use the term torque induced precession (as Wikipedia does), in order to reduce the angst about comparisons between gyroscopes and rotor systems.
Second we could rephrase it as an exam question, maybe "Either (a) Describe in terms of its underlying physics any cause of control phase lag in a helicopter that is not wholly explained by torque induced precession; Or (b) choosing a suitable reference system estimate what proportion of helicopter control phase lag arises solely from torque induced precession".
I am genuinely interested in the answer. Many instructors have been told over the years that using torque induced precession as a first order explanation for helicopter control phase lag is either plain wrong, or a gross oversimplification. It would be nice to have that confirmed or squashed.
Last edited by Wide Mouth Frog; 22nd Dec 2020 at 17:23.