AC think the problem is a lot to do with the exact English and exactly whatever one is talking about. Case in point the blade does flap down if one is in forward flight, but most will think about accelerating the helicopter then the disc is trying to flap back and hence the push forward on the cylic. I have found over the years a picture paints a thousand complicated words, as long as the driver knows what happens when he does x or y , it doesnt really matter the why's and where fore's