heedm,
You're raising a good point and I certainly don't understand it all.
Nick Lappos may be the only person on the forum who can give a definitive answer, but here is my take on it.
On one side, we must assume that Frank Robinson knows what he is talking about and is therefore correct.
On the other side, I think what you are describing may be acceleration (control) cross-coupling. In addition, at hover I question if there even is an acceleration cross-coupling. The reason for this thinking is that blade is consistently adding pitch between 3:00 and 12:00 and this could be considered aerodynamic precession. This aerodynamic precession would be functionally identical to gyroscopic precession (please excuses the use of the word 'precession'
) on this basic teetering rotor.
Your argument may be more appropriate for forward flight, were there is 'transverse flow effect' and the effect of the coning angle. To have an increased angle of attack at the front during hover and have it be higher on the left than the right, something will have to be pulling down on the front of the disk ~ I think.
The final reason for questioning Frank Robinson's remark was mentioned in my last post where
"'Wee-wa' appears to be the same as 'washed-out coupling effect'.", and 'washed-out coupling' is a different type of cross-coupling from 'acceleration cross-coupling' and 'rate cross-coupling'
Then again, you may very well be correct.
