KK multicopter

Hi, I've made a Quad X copter using KK Multicopter blue board v4.5 (ofcourse I waited for 15 days to receive the board after placing the order). But mine is not going up. Its rotating on the ground. I don't what the problem is.... I've tried and tweaked as much as I can do by referring many sites. Also build 4 frames. But in vain. Its been two weeks I'm trying to make it fly.


I've used 

1450kv outrunner brushless motors

12A BEC Esc

3S 25C 2500mAh 11.1v battery

(Above all Powerhd company)


kk multicopter blue board v4.5

Futaba 6 channel T6EXA Tx

Futaba 7 Channel Rx at 72 Mhz


Everything seems to be fine. The board is getting armed and all the controls are working fine.

The weight is under 900g.


Trying to figure out what happened since 1 week.

You can check this video


I'll be more than happy if some one could help me on this ASAP.



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  • I think the earlier frame which I used and shown in the video is small (12in / 305mm) since the props size is 10x4.7 and there could be TURBULENCE building between the props causing the entire vehicle to imbalance and out of control. So I rebuild another X frame with arm length of 350mm(overnight) and tried to minimize errors fixing errors and vibrations. This seems to be working except minor errors with gyros and the gain adjustment. ( you can check the video). This needs to be rectified and stable flight needs to be achieved.

    All suggestions are welcome.

  • I've built several KK multicopter based aircraft (here and here) and my guess, if it isn't the props, is that your gyro gain is reversed. So the helicopter detects some rotation but tries to correct for it in the wrong direction, making it spin faster, feeding back until it's totally out of control. Here's how you'd fix that. (from here):


    "Reversing gyros:


    1: Set roll gain pot to zero.

    2: Turn on flight controller.

    3: LED flashes rapidly 10 times.

    4: Move the stick for the gyro you want to reverse. (So in this case, the rudder/yaw)

    5: LED will blink continually.

    6: Turn off flight controller.

    7: If there is more gyros to be reversed, goto step 2, else set roll gain pot back."

  • Moderator

    Two things to check:

    - is the software configured for X and not + copter?

    - is your "front" orientation correct on your board?

    - is your board mounted right side up?

    - do you have the CW and CCW props attached to the correct motors?

    I'm guessing it is one of the first two, your video looks similar to my quad when I accidentally mounted my board in incorrect orientation.

  • The props are 2 sets of CW and CCW of size 10x4.7 of APC composite propeller (LP10047) 

    Motors are 12 Amps 1450kv brushless outrunner (PowerHD)

    12A BEC ESC (powerhd)


  • yes, as others suggest check that propeller type (CW or CCW) and motor rotation direction in each arm are correct.
  • Anil,

    After you verify the rotation of the props, what are the max amps/watts on motor and what prop are you using (make, size, & angle of attack)?

  • Does it always try and rotate in the same direction? Have you checked that the ESCs are connected to the correct outputs on the board? These links show the directions the motors should turn for + and X mode:
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  • Are you using counter rotating propellers? If you are not, That would explain the quad wanting to rotate.
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