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Maps made easy

I have had two Phantom 4's literally fall out of the sky at the end of missions. They both seemed to loose power and just fell. Any ides?

Manie Jooste

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Well that isn't good... The P4 batteries can certainly be a bit weird to get snapped in right sometimes which leads us to obsessive checking and rechecking and it wouldn't be the first time that we have heard of the batteries coming out during flight. 

But... The fact that it happens at the end of the flight is a bit telling though. If your battery isn't calibrated properly it will report that its state of charge is different from what it actually is which can cause issues. Dropping out of the sky is not usually one of those issues but it is possible. Every 15 flights or so we take the batteries down to 6-8% and then charge them on on the single DJI charger to make sure the totalizing circuitry is accurate. 

Or birds. Or grit in the motors. Or props flying off. Gravity storms. Who knows The list is endless. Without more investigation/information it is hard to say. If you can get the .DAT files off the aircraft and send that to DJI they may be able to tell you more.   

Zane
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If your battery isn't calibrated properly it will report that its state of charge is different from what it actually is which can cause issues.

Ah, but voltage doesn't lie!  Still hoping it is an option someday on the telem screen without having to open debug.  ;)

Dave Pitman 0 votes
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Thank you for the comment.

Both drone were serviced recently. 

The incidents happened after battery changes on 20 min flights. Both drones were flying with newish batteries less than 40 charges

What I find strange is that both drones did exactly the same thing - it happened very close to me as I saw both of them fall. 

Manie Jooste 0 votes
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Zane, I actually think that the maps made easy app had something to to with the incident. How is it possible that two different drones, both serviced recently with pretty new batteries both suffer the same fate. Is it possible to roll back the last update that I did as I am to scared to use the app now

Manie Jooste 0 votes
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We have reviewed your log files and it seems that they are littered with "Aircraft is tilted - please keep the aircraft stationary and level before flight" in the DJI Diagnostic column of the log file. This is indicative of a failing IMU or GPS module or at least is a IMU calibration issue. In your defense, this is not displayed to the user but it is always important to do a quick checkout of the health of the aircraft in DJI Go before every use of Map Pilot to get the full diagnostics. Without doing that there is no way to know if your aircraft's health is OK before flight. 

Aside from the DJI Diagnostic column stuff, it appears that there was a RC connection dropout at the end of a 2 flight mission. You haven't told us which flights had issues so we are having to guess here... A dropout is a period of time which Map Pilot is not receiving telemetry updates from the aircraft. This is usually a sign of poor connectivity or onboard power problems. 

For more detail, please inspect your flight logs or send us the links so we know exactly what flights you are talking about. 

When you have an issue like an aircraft falling out of the sky it is best to try to figure out the cause before putting another aircraft at risk. 

Zane 0 votes
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Thank you for the reply. The flights in question are P4P v2 Jun 24th, 2020 10:57:40 and P4P Jun 25th, 2020 10:30:19.

I had to finish the mapping job that is why I used my back-up drone after the first crash

Manie Jooste 0 votes
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Those flights do not appear to be in our system. Please email us the CSV log files.

Zane 0 votes
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Will you have support for the Matrice M300 in the future?

Manie Jooste 0 votes
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