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Tail wagging during clockwise circuits
https://www.spirit-system.com/phpBB3/viewtopic.php?f=20&t=3412		 Page 1 of 1
Author:  jjuk [ Mon 22. Jul 2019 15:48:16 ]
Post subject:  Tail wagging during clockwise circuits
What causes the tail to wag during fast forward clockwise circuits?

The tail is hunting noticeably at about 10-20 wags per second.

This only happens on clockwise circuits, anticlockwise (counter-clockwise) flys fine.

I have a stretch boom, a speedup pulley and longer tail blades, but no idea why this happens.
Author:  FrankFuss [ Mon 22. Jul 2019 18:41:23 ]
Post subject:  Re: Tail wagging during clockwise circuits
Clockwise upright, the tail is pulling harder against the torque. Sounds like a tail tuning issue. Did you try to increase Pirouette consistency? Tomáš can tell you what to do for sure.
Author:  thestructured [ Tue 23. Jul 2019 6:27:44 ]
Post subject:  Re: Tail wagging during clockwise circuits
If your tail is sped up and has longer blades you will need to reduce your overall tail gain.

What is your tail gain setting, piro consistency setting, and rudder dynamic setting?
Author:  ZeXx86 [ Sat 27. Jul 2019 8:31:40 ]
Post subject:  Re: Tail wagging during clockwise circuits
Hi,

when Pirouette Consistency is too high it can cause such issue. The problem should be apparent also during fast forward flight.

Could you share your settings file please? I will check it.

What servo you are using?
Author:  jjuk [ Mon 17. Feb 2020 22:39:00 ]
Post subject:  Re: Tail wagging during clockwise circuits
thestructured wrote:
If your tail is sped up and has longer blades you will need to reduce your overall tail gain.

What is your tail gain setting, piro consistency setting, and rudder dynamic setting?


ZeXx86 wrote:
when Pirouette Consistency is too high it can cause such issue. The problem should be apparent also during fast forward flight.

Could you share your settings file please? I will check it.

What servo you are using?



An old post, but i've not had the heli on the bench for a while :D

My settings are attached.

Tail Gain is 40% (in radio), higher than this causes the tail to fast wobble in a hover.
Rudder delay is 8 (KST215mg set to 1520us/333hz/7.2v)
Rudder dynamic is 6
Ruddr revo is 0
Piro consistency is 170
Author:  ZeXx86 [ Wed 19. Feb 2020 15:17:48 ]
Post subject:  Re: Tail wagging during clockwise circuits
It is possible rudder end-points and servo arm length are not optimal.

What are current end-point values?

Attaching your settings here will me very helpful instead of rewriting just few values.
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