1.   Propeller State - Typical Conditions
          1.   Power added
          2.   Vertical speed Vv is up
          3.   Blade pitch 16 and up

2.   Hovering State
          1.   Power added
          2.   Vertical speed Vv = 0
          3   .Blade pitch is 8-16
          4.   Tip vortex forms

3.   Vortex Ring State
          1.   Power added
          2.   Vertical speed down (descent)
          3.   Blade pitch is 4-10
          4.   “Smoke Ring” stable vortex

4.   Autorotation
          1.   No power added, P=0
          2.   Vertical descent, Vv<0
          3.   Blade pitch is 4-10
          4.   Double-reverse tip vortex

5.   Windmilling State
          1.   Power extracted
          2.   Vertical descent, Vv<0
          3.   Blade Pitch negative
          4.   No tip vortex