To: Vfrpilotpb
What you are seeing is the effect of leading and lagging.
In one or more helicopter aerodynamics books the author offers the following and hopefully I get it right.
If you could stand above the helicopter and observe the rotor looking at the driven plane of rotation the blades will appear to be evenly spaced.
However if you could observe the rotor system centered on the driving axis (rotor mast) the blades will appear to be unevenly spaced. On a four blade fully articulated system the blades will be disposed like a peace sign.
In either case the system is in balance.
