A wise man once said "Battle ye not with monsters, lest ye become a monster"
I don't know why you guys do. Even without any/much understanding of helicopter physics, i can see this guy contradicts himself, blusters and switches topic. He's just a troll, ignore him.
Whilst discussion is good, and indeed has brought up all kinds of interesting matters, misinformation written in an authoritative way is dangerous, someone might believe it.
My 2c