Vertical tail bobble after aileron input.

[Michaelinpr]

I have noticed that the tail has a small vertical bobble, so elevator issue, after quick aileron inputs. What do I tune to get rid of it? I do not see the same in aileron although it may just be harder to see because there is no tail to see the bobble.

[tshelby73]

Lower swash gain

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[Michaelinpr]

That simple huh? I thought it would be one of the pro settings. I will give that a try. Thanks.

[Michaelinpr]

So......lowering swash gain didn't help. It actually got way worse. So I went the other direction and it got better but never comepletely went away.

Is there anything else I can adjust?

[ikon]

Check mechanic, head and tail. Some things mind loosen or not smooth. Hows ur dampner or does ur rpm high enough. Whats heli was that?

[Michaelinpr]

Heli is my Rush 750. This is the last little detail that has been bugging me. I just can't tune in out. It flys great except with hard stops or a lot of cyclic it gives me this little cyclic twitch. Slight but I see it.

1800-1950 rpm on 753mm. Dampers are the hard dampers which is what is designed to run on the 753's.

I have checked for something loose or that has slop. Nothing out of the norm there.

[newbheliusr]

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[velocity90]

Too high swash gain or CG not spot on. And I mean spot on

Wrong gyro tape is also an option. Check spectrum analyser. Should easily give bellow 150vib and no weird peaks. Post a picture if you aren't sure

[ikon]

Yea could be cg or vib. How's your swashplate bearings?

[Michaelinpr]

Tried cg. It was very close but not spot on. Moved the batteries back a bit and made it perfect. No change.

Swash bearing is smooth as it was day one.

Next time out I will try to do a vibe test with the vbar and see what comes up.

[ledfoot]

I had a similar issue last week that was being caused by vibrations being picked up by the Silverline sensor. If you cannot eliminate the source of the vibration, you can remove the thin layer of tape on the sensor and use either the stock Mikado tape that comes with the blue sensor or some Futaba gyro tape. If you are using the Blue or Black sensor, with the thicker tape already installed, your issue may be elsewhere.

[Michaelinpr]

I will try a different tape. I do not have any of the thick 3M that came with the mini but I am sure I can find some.

It is a Blue Line Full with 3M grey right now. Maybe it is too rigid. I just have never used anything else and it was ok so I have never even considered changing the tape.

I will give it a go. Thanks.

[mverhorst]

Originally Posted by Michaelinpr

I will try a different tape. I do not have any of the thick 3M that came with the mini but I am sure I can find some.

It is a Blue Line Full with 3M grey right now. Maybe it is too rigid. I just have never used anything else and it was ok so I have never even considered changing the tape.

I will give it a go. Thanks.

Not sure of the head design on your heli, but could it be a phasing problem?

[velocity90]

Originally Posted by Michaelinpr

I will try a different tape. I do not have any of the thick 3M that came with the mini but I am sure I can find some.

It is a Blue Line Full with 3M grey right now. Maybe it is too rigid. I just have never used anything else and it was ok so I have never even considered changing the tape.

I will give it a go. Thanks.

I can tell from experiments on 4 helis, the new grey blue line tape (basically 2 layers of silver line works great. A lot better than the old white one.