Here's a funny story:
Yesterday I flew my Spark up to the top of a mountain while sitting in the parking lot of the trailhead.... (I had already hiked up two other mountains with my Spark that day)
It's about 400m up and 1km away. The mountain has lots of cliffs that people usually hang out on. I was using and testing a pair of range extenders. Previously flying in the same place without the range extenders I had difficulty maintaining signal when reaching the cliffs (1km away).
Once the Spark got up there I found these three hikers, one of whom decided to drop his pants at the drone! They were motioning me to get closer, and while trying to do so (and not realizing that I was still in Sport mode) I had a slight drop in video signal and then when it came back I saw my drone fly into the trees and crash into the grass up on the mountain with me sitting in the parking lot!
I was trying to decide what to do and wondering if I was going to have to hike up there to get it (it's about an hour hike up, but it was getting dark). Suddenly I can see through the video feed that the guy picks it up and puts it flat on the rock for me. So I take off again and I can see him giving me a thumbs up into the camera! Finally I regain my orientation, stabilize and start recording again (I don't have video of the crash as I was trying to take a photo). I'm trying to think of how to acknowledge his kind resscue of my Spark so I rock my “wings” (in Sport mode) to say thank you. Then girl moons me and a few moments later flashes me! lol
Here's a link to the photo and the before and after videos, which I cannot stop laughing at:
https://photos.app.goo.gl/xkXAtTYcSPBsimXq2
A few of notes:
- the parabolic range extenders work really well, I don't think that I would have been able to maintain signal after the Spark crashed up on the mountain, just over the lip of the cliff without them.
- once I took off from the mountain and began returning I was initially confused by the telemitry of the DJI Go 4 app until I realized that my "home" point was now my most recent takeoff point, on top of the mountain. So I had to stop and manually set my home point at the phone's location. That helped with some of the telemitry, but my altitude continued to descend into the negative, relative to the takoff point. Which made it more difficult to judge how high up I really was. Fortunately it was clear line of sight so once it got close enough I could spot it, the flashing lights on the Spark really help in low light.
- even though I had several more fully charged batteries I decided to not try another flight up that evening.
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