Chosen Solution
When taking off only 3 propellers and the other only goes at half power
Oliver, if your drone has calibration feature, re calibrate. Check the attached trouble shooting links,instruction and guides, Good luck I hope this helped you out, if so let me know by pressing the helpful button. http://www.droneflyers.com/2013/03/how-t… https://community.parrot.com/t5/Airborne… https://www.drone-forum.com/forum/viewto…