This is a short review of the new Align Rotor Hub with four o-rings for dampening. The pictures below show the new head and the changes to incorporate four o-rings to stiffen the dampening. This hub was introduced to fix the tracking problems being experienced using the Align 325mm Carbon Fiber Blades. The hub is very similar in design to the original hub except that it has a deeper recess for the dampers to allow the fitting of four dampers (two either side) instead of just two. I have rebuilt the head and fitted this new hub, I will be bench testing this later today to see if the tracking issues are resolved. I'll be using a stock T-Rex mixers and flybar to make sure it is this hub resolving the tracking issues rather than after market parts I have fitted (such as the microheli flybar and washout set).
	Having removed the MicroHeli flybar set and re-installed the stock flybar hub and mixers I ran the head up to 2300 RPM using the Align Carbon Blades. The tracking was at least an inch out and the blades were flying in and out of track at different collective pitch settings. I also tried the MS Composit 280mm blades which had the same problem. This indicates that the harder dampening isn't fixing the problem. I decided to refit the MicroHeli flybar set and run the test again. This time both the Align Carbon Fiber blades and the MS Composit blades track perfectly at all collective pitch settings. The results for me are clear, the tracking issue is a mixture of things, one of which is the dampening in the rotor head. However, this is not the whole story and the stock flybar mixers and hub and far more responsible for bad tracking than the rotor head itself. The MicroHeli flybar hub which has no slop at all shows this to be the case. The nextt question is whether this tracking issue can be eliminated just by fitting CNC flybar arms to the stock plastic flybar hub. This is the next area of investigation for me in this blade tracking issue. Particularly as this is what Align have released as one of their official upgrades. Having established this root cause I can now remove the bad tracking blame from the Align Carbon Blades.