Adrenaline levels were not too bad during that flight but this changed about 25 minutes later.
I ran the same mission 3 times in a row, leaving what I thought was my best battery until last.
1st mission came back as "going home" but wasn't sure at that time if it had made the max distance because Smart RTH often kicks in on the return leg of the journey.
The 2nd mission was the one shown in the video which I knew had completed the distance because the Litchi app still displayed "Navi" and the phantom had descended to the last waypoint.
I wasn't 100% happy with the 2nd mission because I had noticed a shaky camera/gimbal on lift-off so wasn't sure if this had badly affected the video. Also, the video feed wasn't as good as it can be sometimes.
For those reasons I ran the mission for the 3rd time.
Normally I lose signal for about 8-9 minutes, sometimes I get a green light back on the controller slightly before the video feed returns.
As I was using my "best" battery for this 3rd mission I expected to complete it just as easily as the 2nd.
I lose signal around the point of it reaching the river so from that time I'm watching the clock.
8 minutes without signal becomes... 9.....10.....11......12.....now I'm wishing I'd brought spare underpants.
I'm thinking bird strike, catastrophic motor failure, convinced that something had gone very wrong.
It was after about 12m 30s I decided to text the attached tracker for a GPS position.
At this point I'm just hoping that I get a reply. If I don't then the trackers been destroyed by a fall or maybe its in the river.
About 30-40 seconds later I hear the notification sound on my phone and a set of GPS map co-ordinates appear.
I was about to check them on the map when suddenly I glanced up and saw the drone appear on the horizon about 300m away shining in the sunlight ?
When I got back I checked the videos.
All 3 missions had made the max distance.
1st mission had Smart RTH kick in about 700 mtrs into the return leg.
2nd mission completed as in the video.
On the 3rd mission it reached the max distance, turned around and then about 2 seconds later it stopped again and the Smart RTH kicked in.
It travelled the 3.5 miles back at the RTH speed of about 33km/h instead of the programmed 48km/h.
I ended up with no signal for over 13 minutes.
I did get the signal back but only after rebooting the Litchi app just before landing.
So, what did I learn from this experience ?
Battery performance can vary
