CGY750 "kicking" on Aileron

[dchekas]

I have a CGY 750 setup on my T-Rex 450 Pro.

It seems to start off the flight pretty good, and go through most of the flight fine. But towards the end of the flight, it starts "kicking" left roll, just like a tail kick.

I and D gain are at 40%, Aileron and Elevator are at 50%, Rudder is 33%, AVCS Dmp is 100%.

Any ideas?

[ChadL]

Belt driven tail? Static discharge perhaps...dry winter air. Just a guess.

[pxpep]

Change the left aileron servo.

[dchekas]

The servos are brand new.

I forgot to mention, this appears to only happen in idle up 2.

I know what most of your first thoughts probably are, Yes I have the "combined" trim setup for aileron and elevator, it's the same in all flight modes.

This is the 450 Pro with torque tube, so no static discharge.

[Phaedrus]

FWIW on my 550 I run these settings:

Dgain - 40%
Igain - 50%
elevator+aileron gain - 76%
tail gain - 55%
99% on the AVCSDmp

[joe1l]

Originally Posted by joe1911

The servos are brand new.

I forgot to mention, this appears to only happen in idle up 2.

I know what most of your first thoughts probably are, Yes I have the "combined" trim setup for aileron and elevator, it's the same in all flight modes.

This is the 450 Pro with torque tube, so no static discharge.

Interesting... i had an issue a few weeks ago where my elevator was pitching forward in ID2 for no reason. It started happening after i was experimenting with a new main gear and hub. I was advised to change my id2 by a few hundred RPM to see if it went away. The idea behind it was certain high frequency resonances can disturb the sensor.

[dchekas]

Originally Posted by joe1l

Interesting... i had an issue a few weeks ago where my elevator was pitching forward in ID2 for no reason. It started happening after i was experimenting with a new main gear and hub. I was advised to change my id2 by a few hundred RPM to see if it went away. The idea behind it was certain high frequency resonances can disturb the sensor.

Yes! I've noticed it do this too. Though, sometimes it pitches forward, sometimes backward.

I created a new model and reset all the menu's in the CGY750, and set the whole thing up from scratch again. We'll see if it does it again.

[joe1l]

Originally Posted by joe1911

Yes! I've noticed it do this too. Though, sometimes it pitches forward, sometimes backward.

I created a new model and reset all the menu's in the CGY750, and set the whole thing up from scratch again. We'll see if it does it again.

try adjusting your throttle by a few points up or down just to change the resonance created at that exact RPM.

[Scooterpilot]

Try relocating your sensor

[dchekas]

Thanks guys. I wound up resetting the thing to factory defaults, dropping throttle curve to 95%, and dropped gains to 50% on aileron and Elevator.

Still working on a few things. When I'm happy, I'll post my settings.

Thanks!

[dchekas]

Getting closer, I think I'll have it just about all set this weekend.

Very happy with the unit now that I've got it close to being dialed in.