Ice skaters can't keep moving their arms in forever
no, they reach a steady state - just like when you stop moving the cyclic and the Nr returns to a steady state.
increased angle of attack derived from increased negative induced flow achieved by the flare.
still struggling with English
when you pull the nose up more air goes through the disc faster, so it'll get more of what makes the blades go around - that will make the blades go faster.
and P of F
