Originally Posted by evltoy
Atomic Skull - good pick!
This could be the issue I have with my 550 too. Funny thought that I dont have this problem on my 500fbl that I'm currently building and I have the same bell crank on both helis.
On my 500fb have the Align Metal Tail Rotor Control Arm Set H60186 (no cup) which has no binding on either plastic or metal tail case.
On my 500fbl & 550fb I have the Align Metal Tail Rotor Control Arm Set H60186A (with cup) which has binding in the centre only o the 550.
This now all makes sense why with the plastic kit arms have no bindings as it doesnt have the cups
I had some play time last night so I had to check out what we were talking about.
First I had a look at the 500fbl that had the cup style bell crack (Align metal control arm) and found that I had 2 shims in place between the bearing and the tail case mount.
Then I checked the 550 and found I only had 1 shim in place. I added the copper shim that came with the hk kit and immediately the binding had disappeared. The whole setup is smooth as butter now.
Thanks guys for the ideas & help solving the issue.