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RC helicopter help

FlewbyU

FlewbyU

Active member
Joined
Aug 28, 2002
Location
Pleasant Hill
Moto(s)
Ducati 1098, KX 250, Honda Odyssey Fl250
Anyone on BARF a RC helicopter expert or at least someone with experience with flybarless setup?

I have Trex 450 clone and switched it to a flybarless head with a Kbar gyro and I cannot figure out what is wrong with it. I have spent days trying to get it to work and because there are so many different variable I am not sure what is wrong.

If anyone has experience with Vbar/Kbar setup please let me know if I can meet you somewhere and ask for your help with some setup.

FYI: I have watched many youtube videos and nothing has helped.

Thanks
 
I'm no where near you but have alot of experience with helis...

What is the issue your having? the most common problems people have are the servos are plugged in incorrectly, or the swash type is not correct in the radio.

Let me know what radio you have as well.

Also helifreak.com is the home of rc helis. Lots of knowledgeable people that can help you as well.
 
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I have DX6i radio and the servos are all going in the wrong direction. I have gone thought the set up 10 times and checked and rechecked the wiring and even tired different setups as seen online.

When I go though the kbar/vbar software I cannot get the servos settings to match the settings on the radio. I get the servos going in the right direction the TX but they are wrong on the software. Because the Kbar is making the control inputs to the servos if anything is wrong it will crash. It is really hard to describe which is why I wanted to see if someone had any experience with setting these up.

I have looked on Helifreaks but I think this is something that needs to be looked at my somewhat that knows what they are doing. I have learned a lot about it but I am missing something and I don't know what I don't know.
 
Try this.

When your in the vbar software under the transmitter section, set it so everything moves as it should. So reverse servos in your radio to achieve this.

Then under the servo section on the vbar software, reverse your cyclic servos as needed so they move in the correct directions
 
explorin said:
Try this.

When your in the vbar software under the transmitter section, set it so everything moves as it should. So reverse servos in your radio to achieve this.

Then under the servo section on the vbar software, reverse your cyclic servos as needed so they move in the correct directions
Click to expand...

I have tried this and I get all the funky movements from the servos. One will move high and the other does not move at all. The only way I have gotten to the servo stage with everything moving correctly is when I have the swash set to 90 deg which is clearly wrong and should be 120 deg. Then I go back into the TX setting and the throws are at 40 or 50% instead of 100%.

I get something set in one place and it changes something in another. I watch the youtube videos and they guys go though the setting process and it seems easy but with mine it just does not work that way.

Quite frankly if I cannot get this thing fixed I am just going to put the flybar back on and use it that way. Flew ok with flybar but least I could take it out and fly it.
 
The only way I have gotten to the servo stage with everything moving correctly is when I have the swash set to 90 deg which is clearly wrong and should be 120 deg.
Click to expand...

Technically yes, but you set the swash type through the vbar software. Set the swash to normal, or swash 1 in your radio. Then do as I said in post 4. make sure you have the correct swash type in the vbar software.

You want flybarless. Trust me.. your close don't give up now!
 
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explorin said:
Technically yes, but you set the swash type through the vbar software. Set the swash to normal, or swash 1 in your radio. Then do as I said in post 4. make sure you have the correct swash type in the vbar software.

You want flybarless. Trust me.. your close don't give up now!
Click to expand...

Thanks I will give that a try.

However, I am not sure I have a swash normal or 1 setting. I do have a swash mix for each servo from -100 to +100. If you changing between - and + it changes that servo direction and the travel of the servo. In the flybar setup I needed one servo at -100 and the others at +100. Do you know how this should be set up or just leave them at +100 and set everything with the software?
 
Did you try< turning it off, then turning it back on? :later
 
Unfortunately, I don't have any assistance to offer. I am, however, thoroughly amused by the content of your post combined with your screen name.
 
You have 2 swashplate types for your radio. You want 1 servo 90 degree. NOT ccpm 120 degree.

Leave all your servos at +100 and use your reverse feature to reverse the servos. Again, only reverse the servos that need to be when your in the transmitter section of the vbar software. Not what you think needs to be on the heli. In fact the heli shouldn't be turned on. Make sure left aileron is left, right is right, push and pull are correct etc. Make sure when you go full right aileron it is 100% on the vbar software.if it's not, increase the travel through your radio to get 100%. Do this for all controls. Then put your sticks in the center positions, collective at mid point and click set center.

Just keep clicking continue and select the correct options, when you get to swash, set it to how the swash is on the heli. Most are the HR-3 option. Then when you get to the servo tab you can reverse the servos by clicking on the servo you want reversed.

If you do all this and it is still not correct.your servos are not plugged in correctly.

Also, with flybarless practically everything is done through the software. Expo, tail yaw rate, how aggressive the heli is, all your adjustmemts and fine tuning are done with the fbl software.
 
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explorin said:
You have 2 swashplate types for your radio. You want 1 servo 90 degree. NOT ccpm 120 degree.

Leave all your servos at +100 and use your reverse feature to reverse the servos. Again, only reverse the servos that need to be when your in the transmitter section of the vbar software. Not what you think needs to be on the heli. In fact the heli shouldn't be turned on. Make sure left aileron is left, right is right, push and pull are correct etc. Make sure when you go full right aileron it is 100% on the vbar software.if it's not, increase the travel through your radio to get 100%. Do this for all controls. Then put your sticks in the center positions, collective at mid point and click set center.

Just keep clicking continue and select the correct options, when you get to swash, set it to how the swash is on the heli. Most are the HR-3 option. Then when you get to the servo tab you can reverse the servos by clicking on the servo you want reversed.

If you do all this and it is still not correct.your servos are not plugged in correctly.

Also, with flybarless practically everything is done through the software. Expo, tail yaw rate, how aggressive the heli is, all your adjustmemts and fine tuning are done with the fbl software.
Click to expand...

Thanks I will give this a try and hopefully it will work. :thumbup
 
explorin said:
Sooo???
Click to expand...

So I went through it all again with your advice. Setup was better but still not just right. I swapped two servos even though they were set correctly and it worked. Not sure why but not complaining.

Took it out today and it flew pretty good much more stable than the flybar head but still have some tail wag. I have been changing the setting. Think I need to do a few more things but I should be good to go soon.

Thanks for your advice it was very helpful.
 
Good.

Did you or can you do a trim flight with your unit? It makes a big difference..with flybarless you should have zero trim on anything. Make sure you turn trim flight off after you do it. If you need help how to do it let me know.

I recommend bringing a laptop to where ever you fly so you can make adjustments till your happy. It will take a few flights.
 
explorin said:
Good.

Did you or can you do a trim flight with your unit? It makes a big difference..with flybarless you should have zero trim on anything. Make sure you turn trim flight off after you do it. If you need help how to do it let me know.

I recommend bringing a laptop to where ever you fly so you can make adjustments till your happy. It will take a few flights.
Click to expand...

Thanks I will try that and let you know
 
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