Originally Posted by
Thomas coupling
... Lowering the collective automaticlly induces air below, to go through the disc...is that too difficult for some newbies to understand.
Difficult to understand because it's wrong. At least in the case of fast cruise, as I have been at length to explain in my last few posts, to which you seem oblivious.
I liken it to your point about moving the cyclic back being inappropriate under some circumstances - you are right of course, and no-one is disagreeing. But to say that collective down will always induce an autorotative flow is equally fallacious.