Leaving aside all the theoretical arguements about this subject - everyone seems to agree that rapidly changing wind/shear does affect IAS. This, of course, is because the rate of change of the wind/gust exceeds the rate at which the inherent momentum of the aircraft ie. it's inertia can change. So,now, why is it that the "one parcel of air" concept can totally ignore inertia? Is it because the rate of change is usually so minor at usual speeds?
Perhaps we are straying into the old Bernoulli versus Newtonian argument where neither theory is totally and or wholely at work?
I would also like someone to explain to me the cause of the large change in VSI indications at CONSTANT IAS when turning into or out of a very strong wind with respect to the TAS that I cited earlier. The only cause I can come up with is the large inertial change in speed of the aircraft wrt to it's own TAS.
Last edited by Meikleour; 2nd Feb 2017 at 09:56.
Reason: amplification query