zinkracer said:
Happened to me. Mine has been flown successfully for a number of flights on either of two batteries. After a lot of phone calls and experiments, it was not a battery problem at all. The MC - main controller - uses a barometric pressure sensor in the MC (NAZA flight controller) to control altitude during hover. It is not controlled by GPS. I replaced the MC and test flew it today - just let it hover until battery reached critical warning level. Seemed to solve the problem. I hope this helps someone else. Sure was a PITA for me to ID the problem. Kudos to Jesse at Atlanta Hobby for identifying the problem. Kudos to Damon and Florida UAV for having the part and for shipping quickly the day before Independence Day late in the PM. Got it today and tried it out.
Now to see if I can get warranty on the bad one.
JG
I'm taking mine to the shop to see if this is what will fix mine too. My P2 has fallen twice, and both with a full camera rig in place. Luckily, no damage to the camera thanks to a landing gear (training wheels) setup I have on. Basically, it starts to slowly lose altitude on its own, regardless of how I'm in full left stick up to counteract it. The slow loss of altitude begins to be a quick loss and it just drops like a rock, with the props still spinning (so it's not a complete loss of power). I've cased her until I can figure this out. Nothing like watching an investment this big just fall out of the sky.