OK Collective - help me here.
I've been checking blade tracking forever but I don't recall seeing this phenomenon before. I have it with my home made grips and my entirely stock stuff.
Spin the upper rotor to enough rpm to feel some lift and look at the tracking. Mine is good but not perfect. If I slowly increase throttle the blades are tracking perfectly during the rpm increase. When I stabilize the rpm at the higher rpm, I see just a little tracking error again. I run rpm of both blades to the point where the heli is certainly lifting - if I let go the heli will fly away.
BUT - when I decrease throttle the blades loose anything that even resembles good tracking. The error is perhaps 3/8" at the tips during deceleration. When the rpm stabilizes at the lower rpm the blades settle again. I thought that it was my grips, but I get the same phenom with new balanced blades.

What's that about? Is mine the only one?
And what does that do to the fight dynamics? I know that when my blade tracking is off by that amount the heli shakes and has virtually no lift. Lift loss has to be a huge factor in flight as we try to decelerate for a landing. It seems to me that the loss of lift is disproportionate to the rpm change when I come in from the yard to the patio where I land. I thought it was air washing over the house and pushing the heli down. Now I'm not so sure.

thoughts?
Soloboss