Bad tail wag

[bigSi66]

Just stuck a Beast X plus on V4.1.5 in a trex 500 pro and its got really bad tail wag as soon as it gets a bit of speed on
is it the frequency that I need to change ?
sorry cant remember what I set it to but knowing me the highest lol
the tail servo is a Futaba S9650
Other than the wag its really nice and easy and I managed to get most things right
just that needs sorting so any help would be greatly received
thanks

[waveydavey]

If you mean frequency of tail servo, no that is a given for the servo. You need to look at the gain settings and that your mechanical setup is good, slop free and no binding at all. What radio equipment and how is the BeastX connected IE what channel for your tail gain and what have you got it set at

[bigSi66]

the beast X is into a Spektrum ar6200 dsm2 rx
radio is a JR Dx9
tail is supper slope free gain is set at 45
servo is in what ever slot it said to put it in

[waveydavey]

But by frequency did you mean servo frequency as this is set for the servo type. Or, do you mean tail yaw speed which is controlled by your endpoints. The wag is normally gain related so sounds like too much gain although from memory thats about right for the old V3 BeastX, not sure if they done much with the tail for V4, is it a fast or slow wag and what is the servo ball dimension from centre, should be around 11 to 13mm

[bigSi66]

would say fast wag
yes what servo frequency should it be set at ?
12 mm

[waveydavey]

Here you go, so flashing red 165hz and centre pulse 1520

S9650

blue

200

blue

1520

flashing red

165

So down with the gain a little and see if it sorts it. If you can do fast backwards or pie dish this will really stress the tail and give you the limit for the gain

[bigSi66]

Here you go, so flashing red 165hz and centre pulse 1520

S9650

blue

200

blue

1520

flashing red

165

I will stick that in and give it a try when I next get chance
thanks again

[bigSi66]

If you can do fast backwards or pie dish this will really stress the tail and give you the limit for the gain


If I could do that I would be well happy lol
maybe next year

[crash-test-tomo]

As dave said, providing your mechanics are good, it sounds as though the gain in your transmitter is just too high.
I found this video a great help for tuning beastx
https://youtu.be/mW22FDo0_3c
It is an older video, they use an ar7200bx and some of the terminology is different but the parameters are all the same!
I actually used this as a refresher to setup the beastx plus on my align 550 a few weeks ago.. Flies great! Hth
Dan

[bigSi66]

Will get and have a watch and see if it make any sense
hate this getting old crap :-(

[bigSi66]

Had it set at 333hz so think that might be my issue sorted
thanks guys

[waveydavey]

Here's the servo list

The BEASTX servo list - BEASTX Wiki

[bigSi66]

for some reason thought the futaba servo was better than it really is lol
now need to figure out how to set up the bail out

[Peteski]

now need to figure out how to set up the bail out

If you mean rescue, just follow the instructions in the BeastX user manual and it will work fine. You can set it up on the gyro channel if you only have a 6 ch Tx or on a dedicated channel if you have more. Also presume you have V4 pro firmware otherwise you will need to pay for the upgrade to have rescue functionality.

[bigSi66]

Yes its v4.1.5 what ever that is
did not get the set up manual with it
I am very new to all this so finding it all very hard to get my head round :-(