Quadcopter not flying

S

Steph2000

Member
Hey!

I have built myself a quadcopter, but still have some rather basic questions as it seems not to be willing to fly…

Maybe it’s best to start with the exact configuration I used:

1x Turnigy 9X 9Ch Transmitter w/ Module & 8ch Receiver
1x Hobbyking KK2.1HC Multi-Rotor Hard Case Flight Control Board With Remote Programmer
1x Q Brain 4 x 20A Brushless Quadcopter ESC 2-4S 3A SBEC
4x 5930 EMP Outrunner brushless motor C2826 KV1000
4x 7x4 SF Propeller
1x FC Z450-V3 Copter Frame Quadcopter Airframe Fiber Glass 450mm Wheelbase MultiCopter (350g)
1x Turnigy 2200mAh 3S 20C Lipo Pack (250g)

The frame is a simple cross (no dead cat setup). Total weight of the copter is about 900grams (32oz). I did not yet attach any camera.

I have the following problems:

  • I am unsure how to setup the motors. When I read posts online, I learn that I have to use the setup provided by the KK2.1 (under the motor layout menu). This basically comes down to motors 1 and 3 turn in the same direction, while motors 2 and 4 turn the other way. However, I also read posts that I should use Counter Clockwise and Clockwise propellers. That confused me as it is unclear to me where I should put these. I currently also only have one type of propellers. Any suggestions?
  • Second, I use the KK2.1HC, which has a function to test the sensors. However, it gives an error “acc Z NOK”. This results in the system not starting up. At first I did not have this, but now it didn’t go away. I managed to get it corrected by putting the KK2.1 upside down (saw somewhere a guy who fixed it like that). I am not sure if this will also reverse the functioning of the board, as it might now try to push down the copter instead of going up?
  • Last, as you can see above, I use 7 inch propellers with a KV1000 motor. I thought this would be sufficient, but as it seems not to be able to lift the quadcopter? I tried the tool ecalc xcoptercalc and it seems to indicate that I should use 10 inch propellers. However, my exact configuration was not listed on their site, so I cannot be sure...
I hope the above gives you an insight what might be going wrong… I plan on purchasing different equipment if necessary, but I hope that I then purchase the correct equipment J

If you require any additional info, let me know!

Thanks!
Steph
 
image.jpg image.jpg image.jpg Motors 1&3 are clockwise and 2&4 are counterclockwise ( with the copter in front of you front pointing away from yourself - motor 1 is furthest on left then count clockwise) there should be a difference in how they look if you are using all four the same and 2 rotate cw and other 2 ccw then they will cancel each other out and it wont take off - i would imagine - new to this but reading furiously these past few days
 
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Hi mate ok motor are as this top left turns cw top right ccw , bottom left ccw bottom right cw , so to get the motors that turn the wrong way to go the right way ,just change any 2 wires on the ESC this will reverse motors also make sure props are on right motors ,Please dont mount props till its all set up and ready to fly , your need to calibrate ESCs , to do this turn on transmitter and put to full throttle , then hold down button 1 and 4 on the kk while doing this get some one to plug in the battery on the quad , your get a bleep once you hear this lower throttle and it will bleep again ,thats it all done
 
Thanks! I had put the motors 1 & 3 clockwise and 2 & 4 counterclockwise. I understand that there is no such thing as a special (counter)clockwise propeller?
Sadly, my quadcopter stays put :-( I also performed the calibration of the ESC.

Am I correct to understand it is normal that motor 1 & 3 blow upwards, while the other 2 blow downward?

I also removed as much as possible stuff from the quadcopter. It is now down to 750g, so I hope that the motors are able to lift this?...

Probably I am missing some crucial part, but I just cannot find it...

Thanks again for all the help!
 
Hi mate , NO my friend all motor lift due to the ccw props or cw props , I See your running 1000kv motors i would have 10x4.7 props as the props you have are a little small at 7x4 these are normally on 2800 kv
so get 2 cw props ,2 ccw props at 10x4.7 if you can get carbon fibre the quad will fly much nicer on it
The way i remember the motors are the top 2 turn toward each other the bottom 2 turn away from each other
 
Ok :-) Thanks for the clarification! It is not easy to come by propellers over here it seems... I ordered before the following 10x4.5, as I suspected already that my 7 inch would be a bit too small... I think they contain both CW and CCW props (called 1045 & 1045R). I am sad that I will have to wait again, but am hopeful to know that it will work then! I will get back when I have my props!

Thanks again!
 
Hey! I finally got my props :-) Now I have to install them. As I have 1045 and 1045R props, can you advise where it should put the 1045 and where the 1045R? I have an X configuration, with the top rotors turning to eachother, and the bottom turning away from eachother... Should I use the 1045R for the CCW rotors or the other way around?

I don't want to break these props, as I will have to wait again a long time then :-)
 
In the end I gave it a try with the following config:

M1: CW with 1045R
M2: CCW with 1045
M3: CW with 1045R
M4: CCW with 1045

Sadly,my copter is still not flying. I assume the motors just aren't powerful enough. I also notice that sometimes one of the motors just stops of a moment. This migh also point to the fact that the motors are insufficient?

I use:
4x 5930 EMP Outrunner brushless motor C2826 KV1000
as motors. Anybody a suggestion which motors I should use and which are compatible with the
1x Q Brain 4 x 20A Brushless Quadcopter ESC 2-4S 3A SBEC

Or am I doing something else wrong?

Thanks!
 
Do you know the weight of your build? According to the page it says that these are for airplanes. Quadcopters dead lift. It could be that these motors may not be powerful enough. The page does not tell anymore than the KV of the motors. Do you know the wattage?
 
Hi the props are the wrong way round R is reverse so it will goes as
front left motor cw normal prop , front right ccw R prop
back left ccw R prop back right cw normal prop
it will them fly
1000kv on a 10x4.5 is more than powerful enough to fly trust me had the same set up
 
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holtneil said:
Hi the props are the wrong way round R is reverse so it will goes as
front left motor cw normal prop , front right ccw R prop
back left ccw R prop back right cw normal prop
it will them fly
1000kv on a 10x4.5 is more than powerful enough to fly trust me had the same set up
Click to expand...


I was talking about the power of the motors not the speed per volt. ^ But if that is true that be a good way to keep it on the ground lol.
 
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