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Bye Bye Mavic - How to lose it in 5 easy steps...
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3905 106 2017-4-7 02:34:19
Wellsi
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Well, after a few months of fun, I managed to completely lose my new toy, meaning I couldn't even claim on DJI Refresh.

Lost it whilst flying down near Dover by managing to convince myself it was being blown backwards out to sea by the wind.  Funny how one simple error can compound itself and steer your mind into making further mistakes as the panic slowly increases.  End result:  completely lost and truly unlikkely ever to be found by anyone...

Anyway, I made a video using the streamed footage and flight data.  After flying for over 18 months I'd have liked to think I was experienced enough not to make any of these mistakes. But I did, so I guess others could too.  Here they are, in all their glory, so hopefully someone, somewhere, won't do the same!

Cheers,

Ian







2017-4-7 02:34:19
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DroneFlying
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I'm sorry for your loss, but talk about making lemonade out of lemons: that's an outstanding video with a very thoughtful and thorough analysis of what happened. And I'd like to believe that nobody would be laughing about it or thinking it could never happen to them.

There is one thing that I'm curious about, though: do I understand correctly that you landed in the park and shut the motors down but after the connection to the controller was lost the Mavic took off again and tried to fly back to the home point? That behavior certainly would have surprised me too: I would have thought that once it had landed -- regardless of its location -- that it would stay there even if the connection to the controller was then lost.
2017-4-7 03:31:27
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SkunkWerxs
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2017-4-7 04:56:01
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Jason Lane
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Excellent post and video. I can understand how, with a little bit of panic, we can forget some of simple things such as to occasionally check your Mavic's position on the map if it's out of sight, rather than fly solely through FPV.

In hindsight, do you reckon the slowdown may have actually been due to the Sun setting off the Obstacle avoidance, rather than the wind overpowering it?
2017-4-7 04:55:51
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Jason Lane
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DroneFlying Posted at 2017-4-7 03:31
do I understand correctly that you landed in the park and shut the motors down but after the connection to the controller was lost the Mavic took off again and tried to fly back to the home point? That behavior certainly would have surprised me too: I would have thought that once it had landed -- regardless of its location -- that it would stay there even if the connection to the controller was then lost.

If this is indeed what happened, I think this would be the 2nd time I've heard of this behavior. I think I even read a DJI rep say that it's the expected behavior. If so, it seems like another bad programming choice. In the other incident, I believe the user said that he made the mistake of powering off the RC before the Mavic after doing a manual landing, and so the Mavic took off in an auto RTH. Pretty ridiculous, if you ask me. I know we're supposed to power off the aircraft first, but I certainly wouldn't expect the Mavic to RTH in the case of such an easy mistake. I'd like to go and test this out myself, but I'm traveling and won't have the opportunity for several more days.

@Wellsi, you said in the video that if you had used the autoland feature of the app, the Mavic would have stayed put. What makes you say that? Do you know for sure that it would have behaved differently?
2017-4-7 05:00:36
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DroneFlying
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Jason Lane Posted at 2017-4-7 05:00
If this is indeed what happened, I think this would be the 2nd time I've heard of this behavior. I think I even read a DJI rep say that it's the expected behavior. If so, it seems like another bad programming choice. In the other incident, I believe the user said that he made the mistake of powering off the RC before the Mavic after doing a manual landing, and so the Mavic took off in an auto RTH. Pretty ridiculous, if you ask me. I know we're supposed to power off the aircraft first, but I certainly wouldn't expect the Mavic to RTH in the case of such an easy mistake. I'd like to go and test this out myself, but I'm traveling and won't have the opportunity for several more days.

@Wellsi, you said in the video that if you had used the autoland feature of the app, the Mavic would have stayed put. What makes you say that? Do you know for sure that it would have behaved differently?

I think this would be the 2nd time I've heard of this behavior.

It sounds vaguely familiar to me too, but I think the first time I probably just dismissed it as confusion on the part of a new pilot.

I think I even read a DJI rep say that it's the expected behavior. If so, it seems like another bad programming choice.

I agree.

I'd like to go and test this out myself, but I'm traveling and won't have the opportunity for several more days.

I'll try this out myself later today and see what happens.
2017-4-7 05:08:28
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Wellsi
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Thank you guys.... your comments put a smile on my face.....

Regarding the landing; well, in my garden, holding the stick down for 3 seconds shuts off the motors once it's on the ground.    When I uploaded to Healthy Drones  / Airdata UAV, it simply showed "loss of signal" at that point, so I guess it landed but never shut off; if the motors had shut off, it wouldn't have started up and taken off again. And had I used auto-land, it should have shut down irrespective of losing signal with the remote...

Ian

2017-4-7 05:19:30
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2017-4-7 05:18:08
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DroneFlying
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Wellsi Posted at 2017-4-7 05:19
Thank you guys.... your comments put a smile on my face.....

Regarding the landing; well, in my garden, holding the stick down for 3 seconds shuts off the motors once it's on the ground.    When I uploaded to Healthy Drones  / Airdata UAV, it simply showed "loss of signal" at that point, so I guess it landed but never shut off; if the motors had shut off, it wouldn't have started up and taken off again. And had I used auto-land, it should have shut down irrespective of losing signal with the remote...

Ok, I see -- thanks for the clarification. Even if the motors are still running it knows it has landed and (in my opinion) shouldn't take off and try to return to home just because it lost the connection to the controller. As Jason said, that seems like a bad design decision.
2017-4-7 05:25:56
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2017-4-7 05:31:28
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Fractures
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Jason Lane Posted at 2017-4-7 05:00
If this is indeed what happened, I think this would be the 2nd time I've heard of this behavior. I think I even read a DJI rep say that it's the expected behavior. If so, it seems like another bad programming choice. In the other incident, I believe the user said that he made the mistake of powering off the RC before the Mavic after doing a manual landing, and so the Mavic took off in an auto RTH. Pretty ridiculous, if you ask me. I know we're supposed to power off the aircraft first, but I certainly wouldn't expect the Mavic to RTH in the case of such an easy mistake. I'd like to go and test this out myself, but I'm traveling and won't have the opportunity for several more days.

@Wellsi, you said in the video that if you had used the autoland feature of the app, the Mavic would have stayed put. What makes you say that? Do you know for sure that it would have behaved differently?

Thank you Wellsi for posting your story, I also would have done the exact same thing as you.

2017-4-7 05:43:14
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Moll51
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Great video and sadly for you but extremely informative for a newly to drone flying. I will take your advise seriously as I don't want to either have an accident or loose the drone
2017-4-7 05:46:51
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4wesomeAdam
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If I have limited landing zones, flying over water or flying over inaccessible terrain I always use 30% power as my SOP for landing the Mavic.

So frustrating when you landed at that park and it took off again.

Thanks for the video.

Apparently the spirit of the Spitfire was not with your Mavic that day.
2017-4-7 05:48:54
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2017-4-7 05:52:18
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DroneFlying
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SkunkWerxs Posted at 2017-4-7 05:31
I think if Landing protecting is disabled the Mavic lands by the Pilot manually and the pilot has to stop the motors
Correct me if I'm wrong?

If that's the case then it's news to me and the manual doesn't seem to mention it.
2017-4-7 05:53:54
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Jason Lane
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SkunkWerxs Posted at 2017-4-7 05:31
I think if Landing protecting is disabled the Mavic lands by the Pilot manually and the pilot has to stop the motors
Correct me if I'm wrong?

I'm pretty sure it still kills the motors after holding down the left stick. I usually keep Landing Protection disabled, and hand catch my Mavic for about 99% of my landings. All I do is hold the left stick down for a few seconds while holding the Mavic, and the motors shut down.
2017-4-7 05:58:05
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PizzaFiend
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Great video and account Ian! Thank you for sharing, and I hope that others will learn from this; I know I have...

Sorry for your loss, and hope that you might find it.

Cheers,

John
2017-4-7 06:02:15
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hallmark007
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Hey Wellsi, tough break but a great video I'm sure no consolation, but the whole irony of the situation you went up to video an aviation memorial and managed to to lose  your own Aircraft , I wonder how many from the war would liked to have lost their aircraft and still be around to tell there story.

Hope you have better luck with your new one. Good look.
2017-4-7 06:02:34
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2017-4-7 06:02:44
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Burmman
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Thank you for the video and sorry to see your Mavic gone. I worry about this every time I fly. I've not even gotten mine very far away and I worry. As frustrated as I would have been I'm not sure I would stop looking for mine. Since you have the new Mavic couldn't you fly to the same area a do an search from above ? Might be able to find it.
2017-4-7 06:04:04
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2017-4-7 06:07:56
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4wesomeAdam
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SkunkWerxs Posted at 2017-4-7 06:02
When I read the manual I didn't see it either
It was just something I noticed while in the process of flying and messing around with settings
I never gave it much thought till now --- Wellsi Definitely Saved many Mavic's with his Video

Where is this setting found?
2017-4-7 06:07:59
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DroneFlying
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hallmark007 Posted at 2017-4-7 06:02
Hey Wellsi, tough break but a great video I'm sure no consolation, but the whole irony of the situation you went up to video an aviation memorial and managed to to lose  your own Aircraft , I wonder how many from the war would liked to have lost their aircraft and still be around to tell there story.

Hope you have better luck with your new one. Good look.

the whole irony of the situation you went up to video an aviation memorial and managed to to lose  your own Aircraft

Yes, and the other irony is that if he'd had a little less battery left while over the park the critical battery threshold would have been reached, at which time the Mavic would have insisted on landing . . . and would have stayed on the ground. It was just kind of a "perfect storm" of circumstances and mistakes.
2017-4-7 06:10:08
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2017-4-7 06:17:31
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Mcflying
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Although the outcome was for you a bummer.
I found it pretty informative,...so thanks.
That made me think?
If all of us watch your clip on Youtube, and let say you get 100K views.
Then you could buy a new one from the youtube advertisements.
Pretty briljant don't you think?

SO EVERYBODY WATCH THIS CLIP!!!!
and learn from a PRO
2017-4-7 06:22:03
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SkunkWerxs
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2017-4-7 06:27:54
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un hombre
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Oh my, I feel so sorry for your loss... Nothing you could do, "Smart" functionality of Mavic made a stupid decision...

This only shows me that I am better of with the "Video cache" enabled instead of disabled...
2017-4-7 06:28:23
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2017-4-7 06:29:53
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Wellsi
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SkunkWerxs Posted at 2017-4-7 04:56
Wellis / Ian,

   Your honesty and understanding of the Mavic system + operation is so refreshing and to make a video

Cheers Skunk!

Yep; a perfect storm of minor mistakes, all compounding.
If it had been the gleeming white Phantom 3 I would be back there doing aerial searches.. if I had started the long flight on full battery, or if I'd checked the map location of it, or if I'd used auto-return, or if I'd used auto land or CSC, or if I'd checked the rotors had switched off, or if I'd not had complete jungle and cliffs between me and it, then I may well have had a happier ending....  But there we are!

Have to say, it's good to read your comments...

cheers
Ian


2017-4-7 06:30:16
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FrequentFlyer
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Very informative and great info.
2017-4-7 06:31:50
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Wellsi
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Mcflying Posted at 2017-4-7 06:22
Although the outcome was for you a bummer.
I found it pretty informative,...so thanks.
That made me think?

Lol....!   
Actually, I think you get around $1 per thousand views, so I'd need a million views to make that money....  
Given the specialist nature of this video, I don't see that happening...  Maybe I'll be able to buy a spare set of propellers
It's a nice thought, but I like that people are seeing this positively and learning the odd tip...

Ian
2017-4-7 06:36:51
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4wesomeAdam
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SkunkWerxs Posted at 2017-4-7 06:17
I use 30% SOP also
But in Wellsi situation realizing the wind and distance, making EM landing --  I don't think that would have been enough.
This could have happen to anybody there's a lot going on when your trying to get your Craft back to you

To clarify, I don't just rely on 30% battery life as the only factor in returning to my original take off point. It is one of many factors I consider that I did not list.

And one factor i use the OP mentioned is wind direction and speed, flying generally into the wind outbound and flying with the wind inbound as much as possible.

2017-4-7 06:34:54
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MavicMule
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Nice recap Ian!  Like others have said, I would of had the same thought process you had.  The final comments are very helpful reminders.  Thank you for posting!
2017-4-7 06:35:43
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hallmark007
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DroneFlying Posted at 2017-4-7 06:10
the whole irony of the situation you went up to video an aviation memorial and managed to to lose  your own Aircraft

Yes, and the other irony is that if he'd had a little less battery left while over the park the critical battery threshold would have been reached, at which time the Mavic would have insisted on landing . . . and would have stayed on the ground. It was just kind of a "perfect storm" of circumstances and mistakes.

When I was looking at that video, and he was saying he lost sight of it and flew past him, if only he checked the small radar at the bottom of the screen he would have had plenty of time to realise where his Mavic was,
So many people don't use that radar but it's the easiest and most simplest ways of knowing the direction Mavic is flying.

Sometimes we all overthink this stuff.
2017-4-7 06:40:15
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4wesomeAdam
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SkunkWerxs Posted at 2017-4-7 06:29
Landing Protection right above Precision Landing

Thanks brother.

2017-4-7 06:43:49
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QuadcopterNacho
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Great video! I actually thought that the quad wouldn't try to RTH after the motors had been shut down. Maybe they didn't?
I think the Mavic displays the RPM on the controller, right? (I didn't get mine yet). Maybe if it happens again to someone, checking the RPM to make sure the motors shut off is a good idea.
Anyway, I would have done the exact same thing as you did...
2017-4-7 06:49:49
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DJI-Ken
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Sorry to hear that Ian, it is a shame when a pilot loses their aircraft.
2017-4-7 06:51:33
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SkunkWerxs
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2017-4-7 06:55:07
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2017-4-7 06:57:14
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ArtistFirst
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Sorry brother.
2017-4-7 06:58:15
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