tail wag

[kraaijer]

Hi guys,

I've got a Logo 500-3D, Actro 18-3, Logictec 6100 combo, KoPropo 2123 on cyclic, Jazz controller.
Headspeed is 2100.

I've got an annoying tailwag, as if the gain would be too high. Yet id doesn't matter where I said it, it never stops.
When I've got gain too low, I is actually not holding. When turing it up, it goes from not holding to the wag.

All shafts are straigth.
I noticed that there's a little lateral play on the tail hub, but I think that that is normal with the thrust bearrings. The srews holding the tailblades are tight.

Any ideas?

Ron

[LITHIUMSTATIC]

I noticed that there's a little lateral play on the tail hub, but I think that that is normal with the thrust bearrings. The srews holding the tailblades are tight.

Any ideas?

Ron
Yes it's normal to have a small amount of lateral play in the tail hub.

Sounds like something is binding. Unhook your tail pitch control rod from the tail servo and make sure it's nice a free. Should be silky smooth.

[kraaijer]

Jeremy, thanks for your reply.
Checked the movement of the rod, it feels smooth.
What is the distance that you've got the ballink on the servo arm from the center?

[LITHIUMSTATIC]

14mm

[murp]

If your running in governor mode it could be the governor is not holding your headspeed very well. Just a thought - it would make sense that no matter where the gyro gain it would still wag if this were the problem. I had a similiar issue when I first setuip my CC85, I had the gov gain too high initially, once I dialled it down everything worked fine.

[billyd]

If your running in governor mode it could be the governor is not holding your headspeed very well. Just a thought - it would make sense that no matter where the gyro gain it would still wag if this were the problem. I had a similiar issue when I first setuip my CC85, I had the gov gain too high initially, once I dialled it down everything worked fine.

+1 that's exactly what happened with my Trex 600e.

You could play around with the governer gain (but I don't know if that's an option on the Jazz). Also you could try a different head speed. Perhaps change your throttle curve up or down a few percent. Sometimes at a certain head speed you can hit a harmonic in the heli and it can cause problems, changing the rpm maybe by 100 up or down can sometimes fix it.

Another issue that can cause it is static electricity. You can try spraying the tail belt with spray silicon every 10 flights or so and see if that does the trick.

Finally the logictech gyro is a picky little thing, make sure your rate mode setup is perfect before switching to HH. And a little wag at the end of a hard piro is typical for the logictech gyro especially if you have it setup for hard 3d.

[kraaijer]

I don't get it, nothing seems to help.

I tried different throttle settings. I lubed the belt. Different gain values. F3C mode, 3D mode, Smooth control...
Nothing, it keeps wagging..... The Logo would fly perfect if it wasn't for that...

I think I'll try another gyro, the Spartan DS760 that I have on my Trex500. I know that the Spartan works with the 6100 servo but,
can the 6100 gyro work the the 9257?

[LITHIUMSTATIC]

It may sound crazy but do you have your wires nice and tidy? I've heard of wires being to loose can cause wag.

[OICU812]

First off guys, its not the governor,,, its a jazz there is not Adjusting gain, that's only on CC and the Gov is 100% better on Jazz than a CC so opt that one out. Next the Spartan can work with ANY servo, make sure to install most recent firmware and software to accomadate servo you may use, I know they revised the resolutions as well to use more servos etc. Aside from this to deal with your 611 installed....

Hmm been awhile since 611, but if my memory serves me correct I could not run more than 90mm MAH tr blades, anything larger and it would wag and have weird tail tendacies in FFF or back flight. Also I could not go above 33% on the 611 screen at 14mm distance on horn. Because of the speed of the tr on the Logos the 611 is on the edge of its optimum ability. I also recall using medium thickness foam on the 611 metal plate as well.

Are you 100% certain your gear channel is activated and that you are in HH? Did you do the 3 flick switch trick on the 611 from norm to HH 3 times to teach the 611 center? In non HH mode will the tail stay straight or drift, is it mechanically set in non HH mode? Questions to think about before taking it off.... :)

[LITHIUMSTATIC]

Shawn he's using a Logictec 6100 not a 611

[kraaijer]

the wires tidy... Hhmmm... well... that could've been a lot better. I will try that befor I swap the gyro.

But the question: Can the LT6100 gyro work with the 9257 servo?
I know that the Spartan works with everything, that's a no brainer.

[OICU812]

Shawn he's using a Logictec 6100 not a 611


LOL CRAP! Sorry about that! Yea I dunno about 9257 and 6100 Logi compatibility etc,...... OOOps! Me bad guys :rolling

[kraaijer]

In the mean time I've tydied up the wiring, split the gyro's wires from the others. That wasn't it. Then I setup the rate mode so it wouldn't turn. I always thought that this would not make a big difference since I'm always flying in HH mode.
It did change a little. The wag is considerably less, but still present.
Although smooth, I did notice that the control slider is kind of heavy to move compared to my Trex 500.
How could I make it go lighter, sand the shaft a little?

[billyd]

In the mean time I've tydied up the wiring, split the gyro's wires from the others. That wasn't it. Then I setup the rate mode so it wouldn't turn. I always thought that this would not make a big difference since I'm always flying in HH mode.
It did change a little. The wag is considerably less, but still present.
Although smooth, I did notice that the control slider is kind of heavy to move compared to my Trex 500.
How could I make it go lighter, sand the shaft a little?


Absolutely could be the problem. Be sure your tail is mechanically perfect. If there's any roughness at all you can get wag. It takes very little to cause it.

Edit: Finless has a great video series on setting up the 6100 gyro. I suggest you watch them if you haven't already. According to finless the 6100 gyro requires a perfect rate mode setup (which includes perfect mechanical alignment of the servo, rod and pitch slider) before it will operate correctly in HH mode. Also you could try playing with the "smoothness" value which will effect wag slightly.

[kraaijer]

I gave up on the 6100. Set the rate mode perfect. Tail's not wagging in rate mode. Switch to HH and bam there it is again.
Slider is smooth now. Played around with the parameters, but can't find any setup that stops it from moving.
So...
I put a Spartan on it.
checked direction, ok.
Tried it out and it's dead on, no wag.
The only thing I couldn't get done is the end-points setup.
I've got the spartan with the 6100 servo now, which according to the documentation is no.2 in the list of servo's (two blinks).
But when I go to the limit settings, the low setting wil just have it jump to one side... the high will not move it completely to the limit.
In a hover it's solid as a rock like this, but I seriously doubt it will do me any good in fast backwards flight.
Any ideas on that?

[kraaijer]

Solved it with the Spartan.

The 6100T is running on the Trex 500 now and works well there...

Thanks everybody for your comments, certainly learned a thing or 2.

[billyd]

Maybe you have a bad gyro.... I run a 6100 on my 600e and it is awesome. I mean really locked in.

[kraaijer]

Dunno, but as said, it does work fine on the Trex 500...

[LITHIUMSTATIC]

Glad you got it worked out, even if it means swapping some things out.