Not getting any lift

[joe_uk]

I can't seem to get the x3 to lift off. It idles up to full head speed then when I increase pitch it vibrates then topples over to the right.

Can someone make a video of the head/swash/servos/blades movements in responce to the stick movements, on the bench please?

Then I can check that it's all correct.

[waveydavey]

Real silly question, blades on correct way. How about you make a video and let us see what's going on

[TonyM]

First impressions I'd your FBL is set up incorrectly, if its rolling over maybe its not correcting roll but adding to it, ie setup back to front?
With the machine not armed, but powered up does the swash tilt the opposite way when you physically tilt the heli?

[TonyM]

On the same theme of FBL, is the pitch slider moving in the correct orientation? got to be something fairly fundemental?

[joe_uk]

[url]https://youtu.be/q9EirYW_CZQ[/url]

I made a youtube video showing the head settings etc.
Sorry it's so long, it's tricky filming and trying to use both hands at the same time! :D

Is that lot correct? I'll check the fbl correction by tilting the heli in the morning

[joe_uk]

[url]https://www.youtube.com/watch?v=la29gKBT2DQ[/url]

Swash plate movement.

[bigpops]

The controls are right, the swash corrections are wrong.

That means your Vbar orientation is wrong in the setup software. You should have face up, wires to the rear chosen.

[Granpappy]

Looking at the video, your Tail rotor Gyro sense is correct in heading hold so I would say that you definitely have your Vbar set as wires back. I've come across this problem before where servos have been reversed in the transmitter and then reversed again in the software setup. This will give correct control sense but opposite gyro sense. I know nothing of Vbar, but in all setups with Gpro and Bavarian Demon, I never reverse the servo direction in the transmitter unless the software specifically tells you to do that. I would follow the setup process again paying attention to whether servos need to be reversed in transmitter or software.

[bigpops]

[QUOTE=Granpappy;1221650]Looking at the video, your Tail rotor Gyro sense is correct in heading hold so I would say that you definitely have your Vbar set as wires back. I've come across this problem before where servos have been reversed in the transmitter and then reversed again in the software setup. This will give correct control sense but opposite gyro sense. I know nothing of Vbar, but in all setups with Gpro and Bavarian Demon, I never reverse the servo direction in the transmitter unless the software specifically tells you to do that. I would follow the setup process again paying attention to whether servos need to be reversed in transmitter or software.[/QUOTE]

The axis is the same if the Vbar is label up no matter which way the wires are coming out. Think about looking at it from the top and rotating it. It still rotates CW/CCW looking down no matter what.

You can also reverse the tail rotor independently anyway.

[joe_uk]

I've undone the reverse in the tx and swapped servo direction in the vbar setup and I think it's now correct. It was set to wires back label up already.

Too windy to test it but hopeing it's now correct :cheers2:

[joe_uk]

Just tried it out as the wind has dropped and it flys :cheers2:

Very pleased. Now back to hover training!

I have a question about the flight controller setup, It's a vbar but I guess the question is generic to all so I'll ask here.

The rudder throws need to be reduced in the TX because the tail slider hits the end stop at about 75% full left stick and 85% full right stick.

To do this, do I reduce the amount of output from the TX, e.g. so that in the flight controller software it shows full left rudder as 75% and full right as 85% ?

I was using a DX6i previously and this was set with subtrim (IIRC), but now i'm using a taranis as I will be selling the DX6i soon. No need to 2 TXs.

EDIT: just to clarify, I have set the output on the TX to 100%, held the rudder full left, and adjusted the throw in the vbar software so the tail slider stops just before it hits the end stop, and repeated this with full right rudder.
Now I have a dead zone on the stick where moving the stick does nothing at about 75% to 100% left, and 85% to 100% right rudder.
This is what I am trying to remove. The dead stick zone.

[bigpops]

When you move your sticks on your transmitter, you're requesting a rate of roll, pitch, or yaw from the flight controller. What happens on the model when not in flight is not a reflection of servo travel that's been set in the radio.

Your transmitter should be set to match the -100 - 100 ranges and directions on the transmitter tab. It's the tab after receiver selection for that reason.

First use channel reversing so the directions match for every input (including aux channels) match the software.
Next, use sub-trim so they're all at zero in the centre (collective can be tricky, so set a temporary pitch curve that is 50% is across most of the stick travel)
Next use the end point adjustment in the radio to get the required -100 / 100 at full stick for each input.

You limit rudder throw on the "tail" tab in the Vbar software. Changing the the travel adjust in the radio will only affect the pirouetting rate of the tail.
On the tail tab, hold left or right rudder, then adjust the corresponding slider so it almost hits the stop on the tail pitch slider.

[joe_uk]

Thanks for the reply. I have done exactly as you say, but I end up with a dead band area where the rudder stick can be moved and the tail slider does not move. This is on left and right, at about 85% stick travel up to 100%.

I can make a video to demonstrate, but its the same dead-band area that is shown on old 401 gyro setups with the dx6i, and those videos show subtrim being applied in differing amounts for left and right rudder.

[bigpops]

As long as the slider in the TX screen moves with the stick on your radio, you're good. Any dead band will show there.

Tail dead band can be set in the Vbar software, but it might need the Pro version rather than express. I can't remember. It's quite common to have a little dead band on the tail, so you're less likely to input rudder when moving collective.