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Quickshot Circle and Crash
4011 26 2018-7-16
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alpbird
lvl.4
Flight distance : 779281 ft
Turkey
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Hello,I flew my MA yesterday in the front yard. During the flight, I wanted to give it a try for quickshot circle mode.  All of a sudden, I noticed that it was moving towards a tree while rotating.  Surprisingly, the application had not asked me about the distance. In fact, I have used this mode only for a couple of times throughout a total flight time of 13 hours/140.000 meters. I thought that the sensors would prevent any crash so I waited a little.  Unfortunately, It crashed to a tree even though I tried to stop the circle mode by moving the pitch upwards.

It was my firsh crash after my purchase. Everyhing was looking normal after the crash except for the props. All the props got damaged slightly. Then, I tried to fly the drone after the crash to check it was still flying. Luckily, it was flying. I have changed all the props the same day, but I did not fly.

What I want to ask is whether obstacle avoidance is disabled during the circle mode or not. Secondly, I am a little worried about my MA in terms of stability or any hidden damage. Is there any practical way to check if there is any permanent damage?

Thank you all for your advice, btw, I have already uploaded the flight log.







2018-7-16
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hallmark007
Captain
Flight distance : 8627812 ft
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Only real practical way to check is to send drone in. After crash you should always preform a correct IMU calibration and gimbal calibration.

Unfortunately for you doing a circle mode, Aircraft is flying sideways so obstacle avoidance won’t be much help. It’s best when using these modes to have in mind if something goes wrong, a procedure like how to stop drone, X on the screen and pause button will immediately stop craft , and avoid crash. There also should be an option to change parameters, they may have been set and you just chose to use those settings.

Good luck and fly safe.....
2018-7-16
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saviour
First Officer
Flight distance : 604203 ft
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I'm sorry to tell you this but this was your fault. When you circle around an object, the drone is obviously moving sideways, which means that the drone can't detect obstacles because it has no sidewards
sensors. If you want to stop a flight mode, press the pause button on the RC or change to sport mode.

If all the sensors work properly in the system check and you changed the propellers I wouldn't worry too much. Just do a few test flights in a safe open area and see if the drone behaves normally.
2018-7-16
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Her-man2
lvl.3
Flight distance : 151191 ft
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I've found a link stating that during quickshots obstacle avoidance is disabled....
Mavic Air quickshot obstacle avoidance disabled

But that is a few months old thread and new firmware has become available. The latest manual (end of May) doesn't state the same disablement but still states that above and beside no avoidance is active. Implicitly this indicates that below/front/back avoidance should be active. Where you flying sideways into the tree?
2018-7-16
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Roundhouse_
lvl.4
Flight distance : 13228 ft
Netherlands
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you do know that the MA only has front and rear sensors right? it cannot sense anything when flying sideways like in circle
2018-7-16
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alpbird
lvl.4
Flight distance : 779281 ft
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Thanks for all your comments. I admit that it is totally my fault. I totally agree with saviour that I should have pressed the pause button.
2018-7-16
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DJI Wanda
Administrator
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Hello there. We apologize for what happened. Is there any error message appeared when that happened? We highly suggest to send it to our repair center and let it check as well by our engineers to determine what causes the problem. To start up a case, you can go to https://repair.dji.com/repair/index.
2018-7-16
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alpbird
lvl.4
Flight distance : 779281 ft
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Hi DJI Wanda,
No, I have not seen any error messages appeared. This was totally my fault. I should have been more careful when I was in this mode. After the crash, I replaced the props, implemented IMU and gimbal calibration. Everything seems to be normal now.

Thank you for your consideration
2018-7-16
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Her-man2
lvl.3
Flight distance : 151191 ft
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DJI Wanda Posted at 2018-7-16 06:59
Hello there. We apologize for what happened. Is there any error message appeared when that happened? We highly suggest to send it to our repair center and let it check as well by our engineers to determine what causes the problem. To start up a case, you can go to https://repair.dji.com/repair/index.

Hi DJI Wanda, could you comment on obstacle avoidance either being active or inactive during quickshot modes? That is not fully clear to me.

Thanks in advance.
2018-7-17
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Wachtberger
Captain
Flight distance : 261509 ft
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Her-man2 Posted at 2018-7-17 03:33
Hi DJI Wanda, could you comment on obstacle avoidance either being active or inactive during quickshot modes? That is not fully clear to me.

Thanks in advance.

If you read the other responses in this thread you have the answer already. Obstacle avoidance is not disabled. But it cannot work as usual because the aircraft is flying sidewards in this mode. I have crashed mine one time in a similar scenario and I knew it was 100% my fault.
2018-7-17
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DJI Wanda
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alpbird Posted at 2018-7-16 22:15
Hi DJI Wanda,
No, I have not seen any error messages appeared. This was totally my fault. I should have been more careful when I was in this mode. After the crash, I replaced the props, implemented IMU and gimbal calibration. Everything seems to be normal now.

Alright. But if there's something unusual happen, please let us know.
2018-7-17
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DJI Wanda
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Her-man2 Posted at 2018-7-17 03:33
Hi DJI Wanda, could you comment on obstacle avoidance either being active or inactive during quickshot modes? That is not fully clear to me.

Thanks in advance.

You can refer to the answer of @hallmark007 and @saviour.
2018-7-17
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hallmark007
Captain
Flight distance : 8627812 ft
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How is your drone, is it flying ok.
2018-7-17
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BKahuna
Second Officer
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United States
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Roundhouse_ Posted at 2018-7-16 03:30
you do know that the MA only has front and rear sensors right? it cannot sense anything when flying sideways like in circle

...and downward.
2018-7-17
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alpbird
lvl.4
Flight distance : 779281 ft
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Yes, thank you for your help. It is flying perfectly.
Regards
2018-7-18
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Bing Err
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Flight distance : 9249964 ft
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Her-man2 Posted at 2018-7-16 03:00
I've found a link stating that during quickshots obstacle avoidance is disabled....
Mavic Air quickshot obstacle avoidance disabled

I've had obstacle avoidance kick in when doing a "Dronie" but obviously there are sensors front and back. No sensors on the side equals no obstacle avoidance side to side. The leaked Mavic Pro 2 has sensors on the side right? Maybe we'll have this in for future but not right now.
2018-7-18
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DJI Tony
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Bing Err Posted at 2018-7-18 02:32
I've had obstacle avoidance kick in when doing a "Dronie" but obviously there are sensors front and back. No sensors on the side equals no obstacle avoidance side to side. The leaked Mavic Pro 2 has sensors on the side right? Maybe we'll have this in for future but not right now.

Hi, unfortunately, we haven't received any information if ever that we will release a new DJI Product, I would suggest paying attention to our website for further updates. Thanks for the interest.
2018-7-18
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Bing Err
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DJI Tony Posted at 2018-7-18 14:47
Hi, unfortunately, we haven't received any information if ever that we will release a new DJI Product, I would suggest paying attention to our website for further updates. Thanks for the interest.

Thus the reason I said "Maybe"
2018-7-18
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Roundhouse_
lvl.4
Flight distance : 13228 ft
Netherlands
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yup and downward, cause these are the most important in a question where the user was flying sideways...
2018-7-19
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Kamal Nor
Captain
Flight distance : 307024 ft
Malaysia
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alpbird Posted at 2018-7-16 04:16
Thanks for all your comments. I admit that it is totally my fault. I totally agree with saviour that I should have pressed the pause button.

How was it totally your fault when the Quickshot Circle doesn't work properly?. Like you, my circle mode never successful as it always end up towards the marked object. Luckily I managed to cancel the mode before the crash. Yes I agreed, MA has no sideways sensor but it would not happen if the circle mode works properly.
2018-7-29
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alpbird
lvl.4
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Kamal Nor Posted at 2018-7-29 23:56
How was it totally your fault when the Quickshot Circle doesn't work properly?. Like you, my circle mode never successful as it always end up towards the marked object. Luckily I managed to cancel the mode before the crash. Yes I agreed, MA has no sideways sensor but it would not happen if the circle mode works properly.

I do not quite know what to say since I have used this feature only twice so far. You might be right.
2018-7-30
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GDL
First Officer
Flight distance : 2768694 ft
Singapore
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They should call it Black Hole mode as always fall into the centre.
2018-7-30
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GDL
First Officer
Flight distance : 2768694 ft
Singapore
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Many people reported MA Attack the object it tracks in the active track mode. Be very careful when you use the tracking functions.
2018-7-30
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Kamal Nor
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Malaysia
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GDL Posted at 2018-7-30 00:16
Many people reported MA Attack the object it tracks in the active track mode. Be very careful when you use the tracking functions.

I don't know about others but in my case I only got problems with Quickshot Circle. The rest are all fine so far.  But agreed with that Black hole mode lol (Fly at your own risk)
2018-7-30
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alpbird
lvl.4
Flight distance : 779281 ft
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After my last accident with the circle mode, I decided not to use it again. I am trying to hone my skills to make the circling manually.
2018-7-30
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GDL
First Officer
Flight distance : 2768694 ft
Singapore
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It’s not difficult to fly cycle with MA. Only thing need to aware is ensure the space is clear and safe for cycling. You need to look on screen 100% times to lock on the object during cycle and unable to see the drone. Better to ask a friend to help you look on the drone and warning you if see any danger.
2018-7-30
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Dorset_Horn
First Officer
Flight distance : 93379 ft
United Kingdom
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alpbird Posted at 2018-7-30 01:03
After my last accident with the circle mode, I decided not to use it again. I am trying to hone my skills to make the circling manually.

That is what I'm currently practicing. It will help my poor piloting skills!
2018-7-30
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