I may have forgotten to add "This is my understanding, correct me if I'm wrong".
As for the language- this is NS we're speaking to, and though I know the terms you put forth well enough (I'm no aerospace engineer, but I've got the high school physics + a childhood obsession with the most technical details of how certain things work) but really decided to restrain myself to the layman's terms.
I know the tail rotor doesn't create lift, but I had already explained the concept that the main rotor pulls up- and for simplicity's sake, chose to use the same terminology for the tail rotor as well.
I didn't know that the blades of a choppa were symmetrical, I had always been under the impression they were shaped like wings- flat bottom, curved top. Like this:
As for your saying that the rotor as a whole tilts in directions- I know for a fact you have to be wrong. The rotor acts as a giant gyroscope, and instead of
it tilting, the whole heli would tilt in the opposite direction.
This is what a rotor head looks like:
The dark blue bit sits on the grey thing on a set of ball bearings. It spins with the rotor assembly, while the grey thing just sits as is. The grey thing can be tilted in any direction, and with it does the blue bit.
As the blue bit tilts, it pushes and pulls the pink arms, which
do not tilt the whole rotor assembly, but rotates each rotor along the length of it, so each rotor is pushed slightly up or down.
I'm sorry I don't have the correct terminology for these assorted colored parts, but that is how it works.
