Nervous Tail

[Hydros27]

My tail is a little unsteady at the 2 lower head speeds. It doesn't wag, it just moves around a bit during hover. It does everything else well and works well at 2950.

Here is the setup:
Stock motor, 16 tooth pinion.
Brain/TracX.
Brain Governor. 2550/2750/2950 RPM.
61mm KBDD tail blades with 19 tooth tail pulley.
Tail gain is 29 in the Brain.

I have run the gain up until it wags and backed it off until it was soft and it had the same problem. I ran it once with the Governor disabled with no change. The tail linkage has been resized and moves free.

I can put up with this, it's not a big deal, but I would like to tune it out if possible. Any advice?

[Luigi_tuga]

It should be on 17 tail pulley. The 19 is for high hs flying.

[Hydros27]

Does anybody get away with the 19 tooth tail pulley and low headspeed?

[Raz0rSh4rp]

I have run about 3000 or so with the 19t no problem. How far is your center to ball distance for your tail servo?

[Hydros27]

7mm.

[Raz0rSh4rp]

Hmmm that sounds good. Have you played with dropping i gain on the tail a couple points to see if that would help?

[Hydros27]

I haven't adjusted the PID gains. I will give it a try. Thanks.

[Luigi_tuga]

Or slightly bigger blades or wider cord. Keeping the 19t pulley may be better in smoothness and slightly higher belt engagement.

[Ah Clem]

I have not tached either of my Warps. I suspect they are running right around 3000 RPM.

Both are running the 19T tail pulley and both have pretty short ball spacing on the tail servo (I suspect 7-8mm-been a long time since I installed the arms).

Tail is solid and smooth on both of them.

I was able to up the tail gain considerably when I went from the 17T to the 19T tail pulley.

This is definitely one of those situation where different people have very different results.