BeastX V3 Tuning Guide Updated

[mattooo007]

No I'm going to fly HH but I trying to do setup like at the first page of this topic. It is point 7. in "Tail Setup/Tuning". Is it wrong?

[sutty]

No, it is not wrong. Doing a rate mode set-up can never be wrong, but it isn't always necessary, and an approximate to it will be fine.

The manual describes this step as only being required when there is an obvious problem with unequal stops or rates of rotation.

If the tail pirouettes and stops unevenly in both directions, it is recommended to set the tail gyro to Normal-Rate mode in order to test, whether the tail will drift in a particular direction during hover. If it does, adjust the tail link rod length accordingly, so that the tail blades have the required compensation pitch. Do not forget, to redo the tail rotor limits (setup menu point E).

Something I have never personally experienced with any high end HH gyro, of which the MB is one, and something that I do not even grasp the concept of why a rate mode set-up might even be required at all, despite the frequent discussions I have read and the fact that it is mentioned in the manual.

Hopefully this will not now descend into one of those rate mode set-up discussions now, but honestly, if you intend to fly in HH mode, you will be close enough where you are. Set your travel adjusts on the MB when finished making your push rod/servo horn amendments, complete the rest of the set-up, and go and try it. It will fly great.

Cheers

Sutty

[mattooo007]

You say that I don't have to worry about the small distance which I have there? In spite of slow drifting, I'm not going to shorten the rod more, because this drifting is negligibly, I think. I hope it will fly well despite I'm too on left side on the slider.

[Spunjah413]

I don't honestly believe rate mode setup is even required. I have set up a couple 450's and 500's, none in rate mode.

I simply make sure servo horn is 90deg, blades have a very slight pitch, then set end points. Has always worked flawlessly.

[mattooo007]

Yes, that's why I still think about it. Make only a slight pitch and doesn't matter if it is drifting or not in rate mode.

And other thing, I haven't got 90deg on servo arm, how could I correct it? Subtrims? I also unmounted servo arm and tried to correct it but, I couldn't get on 90deg.

[Spunjah413]

Well if you have drifting, that is certainly a problem. I haven't experienced any drifting before.

As for the 90 of the servo horn, im not sure if your allowed subtrim. Cyclic has built in subtrim adjustment via menu G, but the rudder does not.

On your servo horn or wheel, keep moving it around til a set of holes matches up to perfect 90. If you already trimmed it you will need another.

I will say my 450 Pro does not have its arm at perfect 90, more like 80. I don't have a rod long enough for this as its a frame mounted servo, but it seemed to have worked, altho im not sure how recommended this is. I fly this bird the hardest with perfect tail hold.

[mattooo007]

It is drifting only in rate...I don't know what do I do. I have 3 choices:
1. Shorten rod more until it won't drift in rate mode, but slider will be too on the left side.

2. Do only a minimal pitch so position of slider will be close to the cetre, but a little on the left side. In this case I won't care about drifting in rate mode.

3. Cetred the slider with 0 pitch on tail blades.

I'm thinking about second choice.

[Inverse]

Drifting right, vibes?

[sutty]

Leave it as it is, it will not drift in HH mode, and it is close enough for rate mode, unless you intend to fly in rate mode, which is an entirely different point. When in HH mode the MB will position the slider wherever it is needed to make it hold, as soon as it gets light on the skids.

Not to cast doubt on the argument that a perfect rate mode set-up helps, it certainly cannot harm, but honestly, just go fly. The MB does not care where this theoretical middle is, there is no such thing. It doesn't make it any harder for it to hold if it is off centre, all positions on the slider are equal, and can be reached just as easily. As soon as the heli can move it will determine its own neutral point, and it matters not if this value, to which it has had to drive it, is exactly the mid point of the servo pulse width or not. The width of this pulse isn't going to make it take any longer to change this value to some other value if it has to make corrections.

The MB will know how wide your slider is, you tell it at set-up step E, and it will know where it is on the slider at any given moment, and it will put the slider anywhere in that range that it can, to make corrections as necessary. All you need to do is get things roughly right, and it will work, it always has for me, and for most other people too.

If you do the following, it will work, but if it doesn't you can worry about doing a perfect rate mode set-up then. It won't make any diference, but you can worry about it if you like.

Set the servo arm to roughly 90 degrees. Better maybe if it is perfect, but it will be fine a little off.

Adjust the push rod length so that the tail slider is in the middle somewhere. If you feel more comfortable with a little anti torque pitch, estimate some, otherwise just estimate the middle.

Set the tail end points in the MB set-up so that there is no binding.

Correctly complete all other necessary set-up steps.

Go fly, it will work perfectly.

Don't believe me, see here from the manufacturer of another high end gyro, to which exactly the same principles apply.

Cheers

Sutty

[mattooo007]

thanks fot your time and help. Now I can move on the other step. I'm really looking forward to fly it after I finish all "tuning" steps

[dineashkumar]

Originally Posted by nwmtech

No problem guys. Glad it will help.

Hi,

i am using high speed analog servo for tail with beastx,
i have set up the tail and it works well in rate mode,
in HH mode it senses in right direction and it works fine till the tx input,
after the tx input the slider moves fast to side and stays there and it dosent sense the helis
movement but if i try correcting the slider and move the slider from tx to center then again it senses properly? but it never move till there is an input from the tx

please help me out in this
thanks

[Inverse]

This is on the bench? That's how HH works, move your tail and you'll see the slider move.

[dineashkumar]

Yes on bench. After I move the tail there is no response from the slider? I need to use tx to move it back. And there is no binding. In rate mode it works fine...

Thanks

Sent from my MB525 using Tapatalk 2

[Inverse]

What gain are you running?

[dineashkumar]

70 on hh and 30 on rate mode.


Sent from my MB525 using Tapatalk 2

[ddhuans]

I setup many helis and MB of my friends and mine without rate mode.
They're fly great without any issue.