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Maximum weight a Tello can carry

sgruschkus

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My 4th grade son used our Tello drone in science project on the effects of weight on a drone's battery life. Just wanted to report that the Tello performed well carrying weight less than 60 grams. At 60 grams of added weight the Tello drone hovered in place for a couple of minutes and then started acting crazy and landed. This occurred when the battery was still at 50%. I've attached a pic of the Tello carrying precisely 60 grams.

Tello_60g.jpgTello_60g.jpg
 

Ansia

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You should've removed the Propeller guards. Would have shaved a few grams off the weight.
 
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sgruschkus

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And how does the weight affect battery life?
He ran 3 fully charged batteries for each weight and took the average of the 3 runs.

RESULTS:
No weight (drone, battery, and prop guards only): average hover time was 10 min 35 seconds (shorter than I had expected)
20 grams of added weight: average hover time was 7:58
40 grams: average hover time was 5:40
60 grams: Tello hovered for approximately 2 minutes and then started spinning, acting erratically, and landed before the battery was fully depleted
 

Pete162

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Might have been an overheating problem of the engines!?
 

SleepyRobo

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IMG_20180613_164604836.jpgthis was my solution to overheating problem with motors, I super glued some pieces of a aluminum CPU heatsink all the way around the exposed motors, total weight of pieces was around 1-2grams. It's a passive cooling system and allowed longer flight times in 90F temps outside in the sun. I could get close to 14min without any accessories but before in same heat of same day I could only get 10-11min of flying, not just hovering. IMG_20180613_164604836.jpg
 
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SleepyRobo

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As the motors heat up, they have a higher resistance in the motor so it takes more power to spin the motors at the same speed, this causes higher amp draws on the motherboard and in turn the battery drains quicker, if you can help the motors maintain temp with less fluctuations in temp you will see better flight characteristics. Also as you add accessories, switching out to a different propeller and pitch can regain proper motor speed and flight endurance. Those stock props have greatest efficiency with no accessories added to the drone.
 

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