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Spark fan always on
849 15 2018-9-18
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Zeflex514
lvl.3
Flight distance : 222743 ft
Canada
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Hi,

I  noticed the spark fan into the spark is always on, whatever the temperature is. I know it should be to cool the esc, if the logic applied is the same on the RC Cars.

Btw, on RC Cars, batteries are bigger with more mAh into it and some RC Cars don't even have a fan on their ESC.

Is it possible maybe to control the fan according to the spark temperature in the next firmwares ? Like not always on, and when a certain temp reached, make the fan turning faster or slower according to temps.

Just turn on the spark without flying it and it takes around 15 min to eat 15% of the battery. I think this could be improved.

What do you think guys?
2018-9-18
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davidmartingraf
Captain
Flight distance : 27482142 ft
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United States
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I notice the fan on all the time so wouldn't be too worried.
2018-9-18
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Jakab Gipsz
First Officer

Hungary
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It does not cool the ESC, they are built under the engines. The processor is cooled by a lot of magical high performance units. It processes the compass, GPS, and Inercia sensor (IMU) data, manages video data, provides telemetry, etc ... It's really annoying that the processor is spinning on the ground when it is switched on and it is fast-paced the energy. It would have been smarter if only take-off commands to full degree.
2018-9-18
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Wolferl
First Officer
Flight distance : 22615 ft
Austria
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Jakab Gipsz Posted at 2018-9-18 21:16
It does not cool the ESC, they are built under the engines. The processor is cooled by a lot of magical high performance units. It processes the compass, GPS, and Inercia sensor (IMU) data, manages video data, provides telemetry, etc ... It's really annoying that the processor is spinning on the ground when it is switched on and it is fast-paced the energy. It would have been smarter if only take-off commands to full degree.

Yeah, temperature controlled fans are no rocket science...
2018-9-19
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Alex B.
Captain
Flight distance : 4622680 ft

Spain
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I think the fan is on all the time and that is absolutely normal and the way it should be

Fly safe
Alex
2018-9-19
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DJI Gamora
Super Moderator

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Hi, thanks for reaching DJI Forum. We do appreciate bringing this concern to us.  Ideally, the fan should always be on while flying. This prevents from overheating. We appreciate your thoughts about this. Thank you.
2018-9-19
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drewhoover
Second Officer
Flight distance : 323455 ft
United States
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The fan is always on for safety, no matter the temperature.
2018-9-19
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NRRTRAINS 85
Second Officer

United States
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the fan is better on than off .
2018-9-19
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Zeflex514
lvl.3
Flight distance : 222743 ft
Canada
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Ok thanks for sharing your opinions about this !
2018-9-19
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djiuser_pQdIRCmgBuO0
Second Officer
Netherlands
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The fan also could be running when temp gets to high.. It's burning a lot of energy running full speed, also they could make it variable.
2018-9-19
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Zeflex514
lvl.3
Flight distance : 222743 ft
Canada
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djiuser_pQdIRCmgBuO0 Posted at 2018-9-19 12:57
The fan also could be running when temp gets to high.. It's burning a lot of energy running full speed, also they could make it variable.

That's what I was thinking. Like a cpu fan, the fan speed varies according to the temperature of the cpu.
2018-9-19
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NRRTRAINS 85
Second Officer

United States
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the spark needs the fan running to keep all the components cool , if not it's toast . it's that simple , don't try to reinvent the wheel , it turns just fine .
2018-9-19
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KSBV
Second Officer
Flight distance : 766234 ft
United States
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Having the fan run all of the time provides consistent predictability for how much battery you have left.  I'd hate for my spark to decide it finally got too hot when it's 1000' out over water and I was sure that I had battery left to get home until the fan started to run.....
2018-9-19
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H. Arif - 6IX
First Officer
Flight distance : 258061 ft
Canada
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It is always on, but I think it should kick in later on becuase it would also same battery.
2018-9-19
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NRRTRAINS 85
Second Officer

United States
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been watching your post . this pass weekend i went upstate , the temperature was around 60, 70 degrees and the fans would not come on , usually the fans are on from take off to when i land and turn the spark off .  
2018-9-27
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Flighty
Captain
Flight distance : 1911181 ft
Croatia
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Rather on, and a cool unit with steady battery run down,  
2018-9-27
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