Trex 450L maiden flight and weird tail problem

[ollikaukola]

Today I did my maiden flight with Trex 450L Dominator and everything was going well, hovering was ok, no tail wagging or anything until I turned nose left / right.

At this point nose turned but movement was gradual. It didn't go smooth at all but more like a one centimeter at time very fast (one centimeter to left, then stop. one centimeter to left, then stop).

What could cause this? I'm assuming there is some binding on tail although tail was pretty smooth when tested it.

-Olli

[alyon187]

What's your radio, fbl system etc?

[ollikaukola]

I'm using Futaba 14SG radio, Gpro, DFC rotor, 6S setup (all stock in this heli).

Headspeed around 3000 rpm and all gains etc. are default in Gpro. Gyro gain in my tx is 62 percent.

[Larryu]

My guess would be binding. Check the movement on the bench,disconnect the servo and be sure everything moves smoothly.

[prismatic]

Tail gain could be too high. Jerky movement is indicative of high gain. Make sure your tail servo ball link is 7.5mm from center, 10mm is too far.

[ollikaukola]

My ball link was 10mm from center like manual instructed but I also felt that it was too far so I fixed it. Need to remove that slight binding and check those gain values and see if it works. Thanks for your advices.