Tail blow out on 450 Pro.

[James75]

Hello everyone,

any advice on this would be greatly appreciated !

I have a Tarot 450 pro and I'm just learning to hover. Can hold it steady and now trying to do some tail-in figure 8's. However I have noticed that if I give a sharp throttle increase command on the tx then the tail blows out counter clockwise. The gyro quickly corrects this, but I want to eradicate it, if that's possible.

i know that it is happening due to a sharp spike increase in the torque generated by the main rotor accelerating sharply and the tail can't keep up(it is a torque tube). I have tried playing around with the gain getting and have been able to reduce the problem slightly but I now believe I have the optimum gain setting as if I increase any further I start to get a twitchy tail.

i have read that this problem can happen if your head speed is too low. I am still on basic throttle curves and i was using:

0%, 40%, 65%, 75%, 75%

I was only hovering when I gave the command and was below hover speed, so to try and solve the issue I changed my throttle curve to:

0%, 55%, 65%, 75%, 75%

but the problem is still there, but it is slightly better. Is this normal if you do this whilst operating at the these head speeds ? Will the issue go away when I progress to higher head speeds and throttle curves ?
is there anything else I can do ? The only thing I can think of is my pinion. The kit came with a 13t but the motor itself came with a 12t. The 13t was a poor fit for the motor so I am using the 12t, do I need to put a 13t on there ?

Many thanks in advance !!

james.

[milly0812]

Tail blow out on 450 Pro.

You should be hovering at 3/4 stick which relates to 75% throttle on your curve. Changing point 2 will make no difference. Try something like 0-60-80-80-80. You may have too much pitch, if you are still learning you won't need more than 10 degrees IMO and lastly try increasing tail gain until you get a fast wag then back it off until that stops.

[James75]

You should be hovering at 3/4 stick which relates to 75% throttle on your curve. Changing point 2 will make no difference. Try something like 0-60-80-80-80. You may have too much pitch, if you are still learning you won't need more than 10 degrees IMO and lastly try increasing tail gain until you get a fast wag then back it off until that stops.

Hi thanks, I have been following the ebook to set up my heli from RCHELICOPTERFUN.COM and had set it up to hover at mid stick which I have set at a 5 degree pitch angle so hovering at 65% with 5 degrees on pitch. If i change to hover at 80% then clearly I'll need to reduce pitch angle to somewhere between 3-4 degrees, I'm guessing. obviously that will give me higher head speed whilst hovering, is that more the norm when hovering ? The set up I have is for beginners so maybe the ebook suggests this way as I currently have lower head speeds which will make for easier control with e cyclics. I'll have a play around with the settings and see if it improves.

i have got the gyro set like you've recommended too !

Heli is out of action for a couple of days as waiting for a couple of spare parts to arrive.

Cheers !!

[milly0812]

Tail blow out on 450 Pro.

James the problem with your setup is that when you progress beyond the hover and maybe want to fly inverted then you will have to completely re learn your stick positions. Most of us hover at 3/4 stick 5-6degrees of pitch which means that when we flick to idle up the Heli stays where it is. With your setup, flicking that switch will bury the Heli in the ground lol.