I don't know. I know that when I land and shut down all four props, my voltage will go up as much as 300 mv. But in this instance, your voltage jumped up a whopping 600 mv 4 secs before it started falling. What's the explanation? Did you lose a prop? Did you lose four props? Did you lose eight props?
Unfortunately, we won't know for sure since the OP is not able to retrieve the DAT flight log. With the information in that flight log, we'd easily be able to see if a motor died, a prop flew off, etc.
The Phantom 3 ships with composite hubs not metal to deal with the braking force. If Metal hubs are used they could unduly unlock due to the p3 braking system. Or am I wrong again?
It's only saved on the Phantom's internal memory card.
You can contact DJI support here.
What ever dji call to term it. The original query "what props were you using" was posed due to the fact that metal hubs have been shown to come loose due to the aggressive position hold / active braking (whatever you prefer to call it) on the p3 whilst in GPS.
Active braking is in the ecs programing, not in the motors. Basically it is for racing quads so that when you lower the throttle to zero, the escs send a reverse voltage to immediately stop the motors with braking force. This is the allow the quad to drop instantly to go under flags or poles on a racing course, not to stop it going forward. Unlike the phantom, the phantom "braking" works by lowering the speed of the two motors driving the quad forward and speeds up the opposite motors. ie the two rear motors slow down causing the rear to drop and the front motors speed up to push the quad back slightly.
That's what I thought. This isn't active braking. It's even less braking than what you described as the way the P3 brakes. The front motors don't speed up since all the motors slow down. It's hard to tell from the plot but the back motors have to be slowing down more than the front motors for the P3 to stop.
I have done it. On the phantom if you raise the throttle then quickly lower it, the motors wind down to a stop, no braking. On my racing quad with active braking, if you throttle the motors up then kill the throttle, the motors brake hard and instantly stop dead.
The P4 in all likelihood does not have a true active braking system. This is just DJI terminology. Why would anyone need the motors of any Phantom to stop immediately.
There you go, air braking. That is self explanatory.
If you 100% want to prevent a prop from flying off, get some 9045 non spin on props from gemfan or another prop manufacturer and use nyloc nuts. I have never had a prop fly off using them. Even in a high speed crash and tumble. Heck, some of those props are almost impossible to break.
