Please select Into the mobile phone version | Continue to access the computer ver.
Flying with Trains_Loosing Connection
833 22 2018-4-21
Uploading and Loding Picture ...(0/1)
o(^-^)o
PedalingDuo
Second Officer
Flight distance : 31896 ft
United States
Offline

I went out to practice my flying skills the other day and put this together.

I had an odd thing happen with my Mavic Air.  Everytime a train would come by my connection to my Galaxy S9 Plus would drop in and out.  When there were no trains passing by it was fine.  It didn't matter if I was in 5.8GHz or 2.4GHz, it did it with both.   Does anybody know if the railroad in the USA uses WiFi on the trains or some other stong radio signal in those bandwidths?

Anyway, I had some fun.  Hope you enjoy this short clip.



2018-4-21
Use props
sky6105
First Officer
Flight distance : 345653 ft
United States
Offline

Very Cool video thanks for sharing.
As for your cutting in and out problem no idea.
2018-4-21
Use props
B1houdini
Captain
Flight distance : 824380 ft
United States
Offline

Great video.
Sorry to hear about the bad connection on your phone.
Did you loose phone connection itself or lost connection between phone and controller?

I do not think the train frequency's interfered with the drone or the phone.
The railroads of North America are assigned a group of 97 frequencies in the VHF band. These frequencies are in the range of 160.110 megahertz to 161.565 megahertz, in 15 kilohertz increments. Outside the VHF band, the railroads of North America use the frequency 457.9375 megahertz for transmissions from a train's end-of-train (EOT) device to the train's lead locomotive.
Phone frequency  are from 1850-1990 megahertz

2018-4-21
Use props
dronist
Captain
  • >>>
United States
Offline

Very dangerous what you did! Second you need to stay away from metal. You had metal all around you!
2018-4-21
Use props
Kevjones1959
Second Officer
Flight distance : 61932 ft

South Africa
Offline

Were u using filters on your lens by the way.
2018-4-21
Use props
Tomcatuk
First Officer
Flight distance : 28743 ft
United Kingdom
Offline

Thats a nice video of trains thanks for the share :-)
2018-4-21
Use props
DJI Elektra
Administrator
Hong Kong
Offline

Hi, there. I would recommend you fly in a recommended environment. Voltage line can have a bad influence on image transmission. Please change a place without interference and see if the performance goes well.
flight environment air.JPG
2018-4-22
Use props
PedalingDuo
Second Officer
Flight distance : 31896 ft
United States
Offline

B1houdini Posted at 2018-4-21 18:25
Great video.
Sorry to hear about the bad connection on your phone.
Did you loose phone connection itself or lost connection between phone and controller?

The symptom was, the picture on the phone would freeze. The drone still responded. And it seemed to happen only when the train went by and it was very intermittent. If there were no trains the picture was fine. And it only affected the phone, the video on the SD card in drone was fine.
2018-4-22
Use props
PedalingDuo
Second Officer
Flight distance : 31896 ft
United States
Offline

dronist Posted at 2018-4-21 19:59
Very dangerous what you did! Second you need to stay away from metal. You had metal all around you!

Why would you consider this dangerous?  The only issue that I had was the occasional freezing of the image on the phone, and that only occasionally happened when the train passed. The drone flew just fine.

2018-4-22
Use props
PedalingDuo
Second Officer
Flight distance : 31896 ft
United States
Offline

Kevjones1959 Posted at 2018-4-21 23:36
Were u using filters on your lens by the way.

Yes, I was using 16 ND filter.






2018-4-22
Use props
PedalingDuo
Second Officer
Flight distance : 31896 ft
United States
Offline

DJI Elektra Posted at 2018-4-22 02:01
Hi, there. I would recommend you fly in a recommended environment. Voltage line can have a bad influence on image transmission. Please change a place without interference and see if the performance goes well.

The mavick air did fine. The environment was OK. The only odd issue was when the train would come by. The drone did a great job I am very happy with its performance.
2018-4-22
Use props
PedalingDuo
Second Officer
Flight distance : 31896 ft
United States
Offline

B1houdini Posted at 2018-4-21 18:25
Great video.
Sorry to hear about the bad connection on your phone.
Did you loose phone connection itself or lost connection between phone and controller?

Oh, and thanks for the info on the frequencies that the railroad uses. You seem quite informed.
2018-4-22
Use props
B1houdini
Captain
Flight distance : 824380 ft
United States
Offline

PedalingDuo Posted at 2018-4-22 04:21
Oh, and thanks for the info on the frequencies that the railroad uses. You seem quite informed.

Did a little more research.
Todays trains are mostly diesel and drive large electric generators that can produce  an EMI, Electromagnetic Fields and Electromagnetic Interference.  It is possible that your devices are more sensitive then others and act like you see it on occasion.
My advise is don't fly near trains. And take the advise from DJI Elektra.
Let us know if the problem goes away.
Fly safe.


2018-4-22
Use props
Kevjones1959
Second Officer
Flight distance : 61932 ft

South Africa
Offline

PedalingDuo Posted at 2018-4-22 04:03
Yes, I was using 16 ND filter.

Very nice, really like the saturation.
2018-4-22
Use props
PedalingDuo
Second Officer
Flight distance : 31896 ft
Offline

Kevjones1959 Posted at 2018-4-22 08:42
Very nice, really like the saturation.

Thank you for noticing the color
2018-4-22
Use props
dronist
Captain
  • >>>
United States
Offline

PedalingDuo Posted at 2018-4-22 04:01
Why would you consider this dangerous?  The only issue that I had was the occasional freezing of the image on the phone, and that only occasionally happened when the train passed. The drone flew just fine.

Did you read DJI Electra response???

Train is metal. Tracks are metals. Probably you took off next to your car.

Second you are flying over a run away train between track signal supports which are also metals  
2018-4-22
Use props
DJI Elektra
Administrator
Hong Kong
Offline

PedalingDuo Posted at 2018-4-22 04:04
The mavick air did fine. The environment was OK. The only odd issue was when the train would come by. The drone did a great job I am very happy with its performance.

It is great that your drone act well in the flight. But I still recommend you fly in recommended environment. Please do not risk your drone and happy flying.
2018-4-23
Use props
Vidjcb
Captain
Flight distance : 4930774 ft
  • >>>
United States
Offline

Well, I just want to say metal is not good for MA. Good metal for me is the one related to music
2018-4-23
Use props
Montfrooij
Captain
Flight distance : 2133671 ft
Netherlands
Online

My best guess is just the amount of metal that was the problem.
Did you also have it when flying higher in the air?
2018-4-23
Use props
PedalingDuo
Second Officer
Flight distance : 31896 ft
Offline

Montfrooij Posted at 2018-4-23 04:46
My best guess is just the amount of metal that was the problem.
Did you also have it when flying higher in the air?

No  the interference came only when the engines came by and only with some of the engines not all, otherwise everything was fine metal and all
2018-4-23
Use props
Montfrooij
Captain
Flight distance : 2133671 ft
Netherlands
Online

PedalingDuo Posted at 2018-4-23 05:20
No  the interference came only when the engines came by and only with some of the engines not all, otherwise everything was fine metal and all

Ok, so there was something different with these engines.
I'm no tech guy so that is difficult for me to explain.
Maybe some radio the operators have that caused the interference.
Or maybe the wagons were equipped with an RFID tag.
Although I doubt they have so much power.  
2018-4-23
Use props
PedalingDuo
Second Officer
Flight distance : 31896 ft
United States
Offline

Montfrooij Posted at 2018-4-23 06:13
Ok, so there was something different with these engines.
I'm no tech guy so that is difficult for me to explain.
Maybe some radio the operators have that caused the interference.

This was from one of the members here.


Did a little more research.
Todays trains are mostly diesel and drive large electric generators that can produce  an EMI, Electromagnetic Fields and Electromagnetic Interference.  It is possible that your devices are more sensitive then others and act like you see it on occasion.
2018-4-24
Use props
Montfrooij
Captain
Flight distance : 2133671 ft
Netherlands
Online

PedalingDuo Posted at 2018-4-24 07:22
This was from one of the members here.

That might be it.
Still strange you only had it every now and then
2018-4-24
Use props
Advanced
You need to log in before you can reply Login | Register now

Credit Rules