CCPM interaction weirdness

[Bunter]

Hi folks

I've recently replaced my Mini Titans plastic rotor head with the Sonix CNC metal upgrade version and set about checking the head for CCPM interaction using the technique Finless describes in one of his excellent videos (a small spirit level on one of the paddles, centralise the bubble at zero pitch which is centre stick and check the bubble stays central at both extremes of pitch.) I do this for the paddle at both aileron and elevator position.

BUT, and this is the weird thing, if I adjust the endpoints for the function I'm checking and set it so there is no movement of the bubble from zero to full +ve and full -ve and then rotate the flybar by 180°, and recheck in the new position, the bubble moves a long way at one of the extremes. I can't figure out how this can happen. If anyone understands what this means and what is probably wrong or has come across this before I'd be most grateful for the hearing from you.

Cheers

Bill

[istandalone]

i believe that is caused by the flybar cage not being perfectly level with the swash and mixer arms. i battled with that problem on my 550 for a while.

[jgoodwin]

Do you really mean 180 or do you mean 90 degrees? Just want to be sure.

I should try it on mine. I never measure more than 90 degrees out. Now you make me wonder if my setup could be better. It has worked so far though doing only two 90 degree angles and not all 4 90 degree angles.

J

[Bunter]

Do you really mean 180 or do you mean 90 degrees? Just want to be sure.

I should try it on mine. I never measure more than 90 degrees out. Now you make me wonder if my setup could be better. It has worked so far though doing only two 90 degree angles and not all 4 90 degree angles.

J

Yes I really mean 180° but it was as suggested above, I found a problem with part of the head (the mixer arms) not quite level at zero pitch/centre stick. All sorted now thanks all.

Bill