- Joined
- Nov 14, 2014
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- 49
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I've had my p2v+ for a few months now, so I'm still a relative noobie and continue to make stupid mistakes, I'm first to admit. I had tried a few planned flyback RTH to see how things went but this weekend I had my first accidental one and as I found out later, when I downloaded the video, I came very, very close to piling my Q/C into a hillside when flyback to home auto triggered. I was flying up a long hill on the moor trying to keep the copter at a fixed height above the hillside during the flight, that sets the scene well enough.
Since I also record the fpv vision app screen at the same time as recording the camera output to the sdcard on QC, after the event I was able to merge the two videos together and slo mo it through to see how the action developed through first losing the fpv vision, it froze when the signal was lost, then the R/C to phantom link went, I was flying completely blind at that point of course. Actually with the sun so low in the sky the smartphone vision screen was not that easy to see in any case, so it was easy to miss key indicators on the screen.
Before offering you a view of the developing near pile in, I am well aware of what I should have done as soon as I lost fpv, as I had also lost visual contact with it against the moorland background on Dartmoor, UK where I was flying, in the low morning sun. I should have immediately stopped flying the Q/C in any direction but vertically up, pdq, but I didn't and almost paid the price.
As I mentioned I produced a slow motion video of the incident so that I could study in detail what was happening and more importantly, why it happened. I've uploaded it to youtube as it might be of interest to other phantom users. It is at 1/4 normal speed for ease of following the events and signals as they triggered on the smartphone. I estimate I was < 1 metre above the ground when RTH automatically triggered and the Dartmoor tussock tops are that high so I know just how lucky I was not to pile her in.
See
http://youtu.be/NUn0Ct375-4
I've a couple of questions from this experience that I hope someone might be able to answer.
Firstly, does anyone know the time lag when flying the phantom between where the quadcopter is and what is appearing on the vision screen? Any lag could be very important if you are flying in proximity to an object, in my case the ground, almost five hundred metres away from the home point. There doesn't seem to be any difference, once I synchronise the two at the start of the video so the lag, if any doesn't seem to change over 500 metres of flying.
Secondly, the signal message I received "Phantom Connection Broken" was not one I've seen mentioned in the dji user guide. Has anyone produced a list of smartphone vision app screen messages that can be displayed from the DJI vision app? If so could you share it with us.
If any of you wonder what I use to obtain the smartphone fpv screen video then please have a look at the thread I started on the "first person view" section of the forum where you can read about it at some length.
Look forward to hearing from anyone who can help
Dave
Since I also record the fpv vision app screen at the same time as recording the camera output to the sdcard on QC, after the event I was able to merge the two videos together and slo mo it through to see how the action developed through first losing the fpv vision, it froze when the signal was lost, then the R/C to phantom link went, I was flying completely blind at that point of course. Actually with the sun so low in the sky the smartphone vision screen was not that easy to see in any case, so it was easy to miss key indicators on the screen.
Before offering you a view of the developing near pile in, I am well aware of what I should have done as soon as I lost fpv, as I had also lost visual contact with it against the moorland background on Dartmoor, UK where I was flying, in the low morning sun. I should have immediately stopped flying the Q/C in any direction but vertically up, pdq, but I didn't and almost paid the price.
As I mentioned I produced a slow motion video of the incident so that I could study in detail what was happening and more importantly, why it happened. I've uploaded it to youtube as it might be of interest to other phantom users. It is at 1/4 normal speed for ease of following the events and signals as they triggered on the smartphone. I estimate I was < 1 metre above the ground when RTH automatically triggered and the Dartmoor tussock tops are that high so I know just how lucky I was not to pile her in.
See
http://youtu.be/NUn0Ct375-4
I've a couple of questions from this experience that I hope someone might be able to answer.
Firstly, does anyone know the time lag when flying the phantom between where the quadcopter is and what is appearing on the vision screen? Any lag could be very important if you are flying in proximity to an object, in my case the ground, almost five hundred metres away from the home point. There doesn't seem to be any difference, once I synchronise the two at the start of the video so the lag, if any doesn't seem to change over 500 metres of flying.
Secondly, the signal message I received "Phantom Connection Broken" was not one I've seen mentioned in the dji user guide. Has anyone produced a list of smartphone vision app screen messages that can be displayed from the DJI vision app? If so could you share it with us.
If any of you wonder what I use to obtain the smartphone fpv screen video then please have a look at the thread I started on the "first person view" section of the forum where you can read about it at some length.
Look forward to hearing from anyone who can help
Dave