I just purchased a Hunter VTail 400 with the MPU 6050 MultiWii flight controller, and I am having difficulties with motor spin direction. The front two rotors spin inward generating lift, but the two rear rotors both turn to the left, i.e. clockwise. As a result, the drone is creating lift incorrectly and tips over onto it’s left side. Is there a way to fix the motor spin direction through programming changes? Also, the threaded nuts on the rotors are not counter sinking. Any help is appreciated.
Hi bbdvip,
To change the rotation of a brushless motor, you have to change two of the three wires going from the ESC to the Motor.
You should always do the test of rotation WITHOUT the propellers on the copter as it’s very dangerous.
Out motor have the same thread for our kits.
Just tight them and you should be fine unless you hit the ground.
Worked like a charm, thank you! Now I’m waiting for my battery to recharge before I perform a test flight. I will keep you posted 
My drone now creates lift (thank you), but it has a balance issue. With the battery up front, the front seems heavier than the back, so when I throttle up the drone moves forward instead of hovering. Do I need a gyro to fix this issue? I do not want to add more weight to the drone and reduce its overall payload. Will the Quadrino fix this issue?
You already have a Gyro in the VTail that’s what the MultiWii board is.
Make sure the Yaw/Pitch/Roll Receiver signal in the GUI show 1500 when you don’t touch anything on the transmitter.
If they are not, you need to trim your transmitter.
After I trimmed my transmitter, my roll setting will not stay at 1500 exactly - it either does 1499 or 1501. Will this cause any huge issues?
i am so glad that the problem was solved.Then i can have a rest.
Sorry for the late reply…
No it should not affect, do you fly in Acro only or stabilized ?
I’m not sure what those settings are? Is there a way to set that up in the flight controller? I have been having issues with the front of the drone being heavier than the back and the back taking off first and causing the drone to crash. Any suggestions? I was thinking about getting larger propellers for the front or changing the program to have the back spin slower than the front on take-off.
A MultiWii board have many functions that can be Activated or not in the MultiWiiConf software.
When nothing is set, the board will only compensate with the Gyro sensor and this is called “Acro” mode or “Not-Stabilized”.
In ACC mode it will use the Accelerometer to try to stay “Level” when you are not touching the sticks.
It is always suggested to make the drone fly in normal Acro mode first.
The drone being front heavy should not have much effect if you use the right setup in the FC since it already compensate for the VTail configuration.
Any idea why my v-tail is not achieving lift? Do props lose structural integrity and the ability to create lift? My drone uses plastic props. The spin pattern is correct.
It can be many things, first would be to balance your propellers.
Vibration will kill trust when using a Flight Controller.
Can you post a picture of your craft ?