Originally Posted by
aa777888
I don't have one. The books I have say transverse flow. Right or wrong, that's what they say. And when it's time to take my next written knowledge exam, I will parrot the FAA answer. Meanwhile you say something else. I don't actually care about the cause, but I do care about whether or not I have ETL when I feel the vibration and that will be the experiment I perform when I next get the chance.
Exactly! When push comes to shove, if you wanna pass the test, you have to go with what the book says!
Personally, I've often wondered if both cause a vibration,...but then these two phenomenon happen so close together do I really need to take out that fine toothed comb and say, "Ok, this vibration is ETLLLLLL and now its Transverse Flow!"?
Anyway, clearly the guys who write these books have their own arguments, and since we're pilots, not engineers, I guess we're just at their mercy?