Hello! I noticed that the fan of my spark sometimes turns off and starts 2 seconds later while the spark is hot..the ambient temperature is 31 celcius..i think that is happening more often when i hold it and i am ready to launch it in my hand..is it normal?

The fan is controlled by a temperture threshold. If the Spark reaches this specific temperature = fan on. Cooled down = fan off. And so on...

Yes but the spark is too hot at the time when the fan turns off..and from the air vents is blowing hot air..

My Spark gets very hot even before flying but I think that's just how it is.

It might be just the battery getting warm... The fans only cool the rest of the unit i think

I think is normal for the spark to be hot if is not flying,since it has 24 cpus/gpus,and it has to calculate camera,sensors etc..but to turn off the fan while it is too hot,i found it weird.. just a thought..