I have ArduPilot 2.6 with the latest firmware. Its a quad with turnigy 3-4s ESCs 28-26 1000kv motors.
When I fly it on 4s it badly wobbles up and down with front right and left rear motors. I have turned down the pids and it will take off then just ocelots till unflyable. I run it on 3s and it is super smooth with no issues. Hovers at half throttle no problem.
I wanted to run 4s because im adding a gimbal and camera. Also want a little larger battery.
Any suggestions as to whats going on???
G day Tconners
what size propellers are you using,this can make a big difference,
sorry if I am stating something obvious to you.
regards Steve.
You need to retune all your pid settings if you go from 3s to 4s. Most likely they will need to be tuned down to reflect the higher voltage the motors are now running, and you will probably need to change your throttle mid also. Make sure if you haven’t changed motors that you reprop them for 4s.
Definitely needs to be retuned to run on 4s. Take the PIDs down more. Multiply all gains of original pids by 0.56 (assuming power is quadratic in voltage, (3/4)^2 = ~0.56)