Xavier1984
lvl.4
Flight distance : 1579088 ft
Switzerland
Offline
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[Phantom 4 Pro - Ipad Air 2 - DJI Go 4 - Last firmware on drone, RC, application]
Hi,
I have some questions about the failsafe RTH process :
- Firstly, the failsafe RTH initialize itsel automatically only when the RC SIGNAL is lost and not when the VIDEO SIGNAL is lost. Is it right ?
So, if i lose the video signal only, i can continue to pilot the drone, and the drone react to the command.
- If i lose the rc signal, the drone stop to move and hover immediatly: is it right ?
After 3 seconds, it launchs the failsafe RTH. go to the rth alltitude (60 meters for my settings), lock GPS signal and go home. The drone must be in a bigger radisu than 20m.
So, now i explain my crash (whitout any broken part on my Phantom 4 Pro).
Link to download the aircraft log :
https://www.dropbox.com/s/0033hyy25imfeqr/FLY188.DAT?dl=0
I fly at 400 meters of the take off point (home point recorded and set for RTH). I am in sport mode (no collision detector). I follow a motorbike on a road with the mountain on the right and clear field on the left, the drone is positioned on the left side.
I lose VIDEO signal, and i think RC signal. The RC make bip bip bip and i have a popup on my screen (Ipad Air 2) and i click on the right box of this popup : i don't remind what is this popup, but i think it is initialize rth CANCEL or OK (could someone confirm me ?). The RC makes bip bip bip bip and nothing happens, i move the stick to up and forward nothing, i press rth nothing. finally the drone was crashed in a small tree on the right side of the road.
I have analyzed log with Airdata, it inform me that i have a data lose, but not anny RTH sequence recorder (logical if i don't have RC signal, not any more log recorded, right?). I analyze the aircraft log the drone don't stop it at all and go at 50 km/h in the tree at the same alitude and in the same direction.
I would like to understand if this is a pilot error or a DJI issue.
I have sent an email at DJI to share the log.
Do you have ani advises or info about this case ?
Thanks :-)
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