dji-p3p1
lvl.4
Flight distance : 534970 ft
Australia
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[Edit] : After I posted this, I have seen threads on this forum where at least 3 other pilots have made a similar mistake and ended up damaging their P3's - Hence I have added "Please Read" to the topic and please also see Tim's post #14 below pic of manual where this behaviour is referenced, and what to do to resolve it.
I want to recount what happend yesterday, so that others can be aware and avoid what I did.
After flying my P3P last evening, nearby, I landed with 30% battery and since I needed to Cycle the battery anyway, and it was getting dark, I decided to take the P3 and hover it indoors (as I have done many times) to drain the battery down further.
I walked the P3 indoors without switching it physically off from the battery button, placed it on the floor and proceeded to CSC start it and hover about 1ft off the floor, when I did a CSC start indoors it, could not immediately find satalites, it went to Atti Mode so did not re-register a new home position.
While hovering indoors, the P3 managed to get a Sat Lock again, and it all went well until the battery got down to the level where the P3 decided to RTH. *This is where I made the mistake. - I Did NOT Cancell RTH.* I thought the RTH was set less then 20M away and the craft would then just land!....
As some of you may have gussed, what happned next, was since the Home position was still where I had previously taken off outside, there was a slight distance error, since i was indoors, the P3 thought it was more then 20m away and naturally decided to return to home, outside!
So it very slowly rose-up, to go to 30M hight (RTH hight is set to 30M) and promptly got stuck with props spinning away, quite happly, to the Ceiling in the room!
What Surprised me is that there was no option available to then Cancell RTH on the screen. I tryed to bring the throttle stick down, but no response.
I did not try CSC shutdown (Because i did not want the P3 to fall on the floor) and I did not press the RTH button, on the controller, in attempt to cancell RTH.
I calmly proceeded to hold the P3 by the legs and pull it down from the ceiling, with props at full speed, and shut it off from the Battery Button.
Very Very Luckly, there was no damage at all to the P3 (it all happned quite slowly, without any impacts). However the Prop Centers got worn out whilst still rotating aganist the ceiling. (See pic.)
I was lucky that there was nothing, but a flat ceiling, in the way of the P3 as it decided to RTH. Had there been a lamp, Chandler or other item, the story could have been different.
This behaviour can also result when flying from a partially charged pack, if the cell voltages fall dangerously low, the quad will invoke RTH.
So Everybody.. Please be Extra Careful flying if you know your batteries are getting low (less then 30%), dont fly under any thing like trees etc. and Like the Lovely Lady Says "Please Check Your Homepoint on the map" at EVERY Takeoff otherwise your quad may try to land at its prevously set Homepoint and Not its last Takeoff point.
Please Note: In order to Cancell RTH once the P3 has started to Asend to RTH hight, you HAVE TO Press the RTH Button Physically on the Controller to regain Control.
It all happens Very Very Quickly, so practising this is a good idea. - Also once the battery level is low and close to Critical do Not be tempted to keep flying the bird unless you know exactly what you are doing.
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