Sadly, my little quad has been lost in Davey Jones' Locker, I fear. I thought I'd try a longer programmed flight, and I didn't account for what would happen if the TX and/or the telemetry radio lost signal. At least that's my theory. I thought it would execute RTL, but it appears it didn't. A couple minutes into the flight (when I lost sight of it beyond some trees (but over the water), the telemetry radio stopped tracking. I went out to the beach and looked around, but the water gets really deep really fast out there, so I suspect it's at the bottom in 20-30 feet of water. I'm sad. Here's the last image from my computer...

[edit] I have a new theory...see my comment on page 2. Maybe it's not in the ocean, after all? According to the source code, the default RTL altitude is "1500cm (=15m). If zero the copter will return at it's altitude at the time RTL was invoked." I'm not sure I ever changed the default, and if that's true and RTL did engage on loss of signal, it's almost definitely going to be in the trees.

Views: 3617

Tags: Davey, Jones, Locker, lost, quad

Comment by Hugues on July 31, 2013 at 3:59pm
Oh sh@&€. Very sad. Could you eventually try to locate it based on last known gps positions and movement direction?
Comment by cedivad on July 31, 2013 at 4:13pm

You live next to a beach, no way that you can find some sub equipment? :)

If you have nothing better to do ;)

Comment by Dave on July 31, 2013 at 5:11pm
What about checking the sand during low tide? I'm sorry for your loss.
Comment by Kristoffer de Jesus on July 31, 2013 at 5:23pm
My friend's DJI dove in the middle of Shenzhen Bay and found it washed ashore during low tide, dried it up and flew again.
Comment by Crashpilot1000 on July 31, 2013 at 6:30pm

My condolences for your loss. But perhaps you are lucky and find it again I keep my fingers crossed!!

The guys over at "my geekshow" tried every function in the line of sight with their fingers on the transmitter.... anyway everybody has good tips afterwards....

Comment by Steve Maller on July 31, 2013 at 7:33pm

Unfortunately it was at low tide. The water's really deep, and there's a strong riptide on these beaches (no swimming anywhere!), so if it did drift in the tides at all, it'd be towards the open ocean. I'll go walk the dog down the beach this evening and see if there's any sign of it, but I seriously doubt it. 

In hindsight, it would be nice to know how that logic works.

Comment by Ricardo Affonso on July 31, 2013 at 8:30pm

well, drones usually crash a lot. quads could suffer from the control and telemetry failures, but also a single broken prop, or burnt motor or speed could make it fall like a rock. next time, don't fly it over water! and if you do, attach some floating device to it, so at least you could get it on the beach with the help of the waves.

Comment by Erman Ozen on July 31, 2013 at 11:28pm
There are key chain size devices that inflate when water or liquid is detected. A worthy investment as well as a chute. I have been meaning to look into these as I do more flights. My first flight was a RTL switch test, second emergency landing and third was cutting transmitter for fail safe. I repeat this every time I load new firmware on my work bench and then in live environment with props before doing a live flight.
Comment by Stefan78 on August 1, 2013 at 12:05am

Steve, just to be sure, did you have the settings correct that it would RTL upon loss of signal?

Did you test RTL functionality?

Comment by Darren Royle on August 1, 2013 at 12:11am

sorry to hear your loss .

a couple of weeks ago while flying waypoints (on a mission used before without problem ) my quad stop still in the air for around 20 seconds then carried on to next way point and landed .the problem being it still had around 10 waypoint left to fly and no delay were set on  any WP .luckly it was over land and not water . battery still over 12v

So I am interested in what  may have happened to your quad .

By the way I had just update mission planner that day ?

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