Hi everyone, I had 3 crash in sequence and I don’t know what else to do, I really need all help possible to analyse my logs and help me to find out what the problem with my drone.
First things first, my HEXA has a Cube FC (bought from irlock), RFD900 telemetry, L9R receiver, mauch eletronics (bec and current sensing), here 2 gps (i2c mode) and other 6v bec to power external servos. My motors are tmotor mn501-s kv 240, tmotor air esc 40A with 20" CF propellers and 6S 16A Lipo.
My problems started at my first crash, I was running in auto mode when in middle air one wire of one motor just broke, the copter tried with success to stabilize, but, I was flying above high grass and when the copter just stabilize it was literaly in the ground and becouse of the grass or something else, two propellers was out and I lost telemetry and radio at same time. I thought that the drone will turn off itself, but after 5 minutes I reached the crash place and all motors was running in full trust and they got extremelly hot, so hot that I’ve burned my hand instantaneously. (Copter version 3.6.12)
After this crash I fixed all problems and flew again and one problem appeared, I was in auto mode and the copter flew in straight line but the YAW was spinning, I never saw something like that. I did 3 attempt but in all flights I had the same problem. When I was on loiter I havent had any problems. (Copter version 4.0.2)
I thought that was problem with the firmware, so I downgraded to 3.6.12 again and did a test, everything was fine in loiter so start my tests and I moved the roll to right and left quickly, to check the stability and the copter just cant stabilize, I did the roll side to side just 2 times and stoped to se it stabilize, but it couldn’t, the copter keept doind the roll side to side without stop and this time started to go up and I lost the control, I couldn’t bring it back so I turned off the motors and I left crash into ground.
I really dont know what is wrong if my copter, I suspect of two things. In my first problems, my motors got extremelly hot, maybe there’s something wrong with them or with my escs, couse’ they should be hot as well. Its weird becouse after this crash, I used the same motor and esc and I done the other crashs, so esc and motor was functional.
Hope you guys help me!
All telemetry and FC logs are here: https://drive.google.com/open?id=1XjdOBHHxnJyXG6subA_WZss7XU2myDN2
*In first telemetry log, the problem occurred at end of log.