Hello,

After arming, when giving throttle to the system, the quad spins on the ground. Unable to take off from the ground, instead its rotation in CCW direction.

We verified all motor connection, Props direction and mounting, Throttle range calibration is OK., ESC calibrating perfectly in a normal way.

My specs :

1. DYS 20Amp ESC

2. KK 2.1 FLight controller with LCD

3. DYS motors with 1000KV, 150W

4. HK Transmitter & Rx, T6A V2 :
http://www.hobbyking.com/hobbyking/s...2_mode_2_.html

5. Nano Tech Lipo 4s, 4500maH, 35C. Also tried with Nano Tech Lipo 3S, 2200maH, 25C.

6. Config - in "+" and "X" mode

This is the youtube link of this observation (Sorry, for poor Quality) :

http://www.youtube.com/watch?v=MIOWcp8RDBA&feature=youtu.be

What can be the reason for this

The video is private! Please list it as unlisted or public.

Pls try it now....

 i think the  the propellors are connected in the wrong way,the same type of props (cw, ccw) should be connected
opposite to each other.pls refer kk2.0 manual for a clear picture

I coluld see that the props are fixed properly, may be d rudder  gyro is damaged, even it had happened to me after the crash

Watched the video carefully ,the props are connected in
The right way

It seems that the yaw(rudder) gyro has to be checked once again.

 What has to be checked in Yaw Gyro settings ? Can transmitter be problem for this issue ?

Check this,  

By adjusting roll trims, I was able to reduce the rotation Rate... But the still the problem exists ..

There are so many check points involved in multirotor.
1. first make sure props rotation is correct as per kk2 configuration.
2. check receiver test and make sure all are correct and shows zero.
3. calibrate escs individual and then together with board.
4. make sure board mounted properly and leveled with the frame.
5. perform sensor test and calibrate them.
it might help you.
EDIT
also check that arms are not twisted.

One I spent a lot of time on once by mistake... make sure your ESCs/motors are connected to the controller in the right order, as per the configuration selected on the board.

For example, if motor connection 1 on the controller is supposed to go to the front right motor, make sure it goes there !

Hello all,

I checked with all basic possible errors like Motor spinning, correct prop direction, wiring connection. Everything was perfectly OK. But the problem still existed.

Then I re flashed the firmware and placed the FC board using studds(Before it was hosted inside the foam). Suprisingly the spin was reduced on the ground rather it started lifting up slightly. I was feeling like  Vehicle is crawling like baby. It lifted off around half feet to 5 feet in different sorties(was airborne only for 3-4secs). But it was PITCHING forward along with yawing effect. It was jumping  I dono Know how to call it. The vehicle started to lift off only after giving throttle of more than 40% along with triming the throttle slowly.

Sometimes I feel that TX which im using might be too heavy for this board (HK Transmitter & Rx, T6A V2 ) http://www.hobbyking.com/hobbyking/s...2_mode_2_.html

Pls check the link for below  observation :



What might be the reasons for this Once again thank you very much.