My quad YAWS VERY BADLY! Pls help

[vineet_p]

Hi all.
I bought a CRIUS MultiWii Lite. Been using it since 4 months. But had my test-flight only yesterday.

dt700 motors, HK SS series 18-20A ESCs, 10x6 props, HK 2.4GHz 6Ch Tx+Rx

Yaw direction currently set to -1. (I am still using v1.9, will upgrade to 2.0 shortly)
WHen I throttle it up to 40%, it goes about 10m high yawing Awfully! At around 15-20%, it yaws around 1 rotation per 7 seconds. But after 40%, at the height of 10m, it yaws as fast as 1 rev/3 seconds!
Had a bad crash due to this today.

It yays clock-wise. Trims are fine.

Can anyone help, please?

[tovrin]

make sure all of ur motors are level. i had a motor bend its mounting bracket and caused it to be shifted and it caused me to yaw heavily

[vpb]

did you check the yaw-gyro direction?

[PatrikE]

Check that all propellors is pulling stright up and not sideways. (tilted)

Hold it firmly in the hand and arm.
throttle up to the point where it starts to compensate.
Twist it Right/Left and feel if it fights the movements.
If not change Yaw direction in config and do the test again.

If all this seems correct try to tilt the motors to conteract the rotation.