I bought this copter from a fellow last year, but have only had a chance to fly it less than a dozen times. I am completely new to this, so it has been a steep learning curve. I am worried that autopilot has had issues since I got it, but I was too unfamiliar to realize it. I had two flight this last weekend, one in an auditorium to play with the basic tuning to see if I can fix the stabilize mode. The second was outside, testing if the compass calibration helped. At the end of the second (about 15 minutes of flying) the copter crashed. This is the second time I've crashed it. The first time a prop flew off because I hadn't noticed damage done to the root of the blade. This time it crashed in much the same way, as if it lost power to a motor, the one side dropped and it flipped to the earth.
In stabilize mode it has a wondering roll and pitch control which doesn't make sense anymore. I always attributed it to this or that (trying to read a lot) but I am wondering if the autopilot is broken in some way. After I had done a compass calibration yesterday, it was better. Sometimes it would hold level without touching the pitch/roll, and sometimes I would need quite a lot of input to keep it level, and other times I would need to put input in the other direction.
Anyway. I have no confidence in this anymore and hope that someone could tell me what's going on. I've attached the first log of the weekend where it was behaving very badly, and I've attached the second log where it was behaving better, but crashed at the end. Any help would be wonderfully appreciated.
5S 5A 25-50C nano-tech battery
no GPS hooked up
Please let me know what other information is needed. Thanks