OnemileH - nice one! I'm just new to all dis whizzo stuff so i think bit over-enthusiastic. Only trying to help tho.
CaptH - sorry if me explainin is poop. Read it over again meself & u rite - it ain't hot.
U rite 2 bout the transient nature of w'shear but don't think it 2 spurious once u bend yer nog around it.
Also u point about turnin being steady state be true in physical world only if no wind. Remem - 'slip' happen to turning plane just like turning prop
due 'mass' (thanks 212 - u gave me that one)
which is a change in momentum; and since when was wind in real world in turb layer steady state?
Yike. Blah caption come on. Thing is, the decr ias theory could be proven to hold soup on paper with rithmatic. In real world tho, many other phenomena are at play which dominate due to the aerodynamics of ac in turn and so mask this.
Experiment for u. 1. Take little cessna & park into 100kt wind. 2. Read asi. 3. Turn little cessna 90deg to wind. 4. Read asi. 5. Compare readings. (6. Retrieve ac from fence). Can do experiment at taxy if want.
Enjoy.