By packocrayons on Aug 20, 2021

6  89  5

I made my own micro 21700 build because I torture myself by never using things other people have come up with. Plus now I have an SLA printed quadcopter!

Rewound eachine 1104's to 4 turns Wye gives about 11000kv. Enough to liftoff on 1S. Beecore F3, samsung 30T 21700 cell.


Part List


microion 21700
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4 x Eachine 1104 6000KV 1-3S Brushless Motor for RC Drone FPV Racing (2 builds)

FPV Transmitter

TBS Unify Pro32 Nano 5G8 V1.1 500mW Video Transmitter (398 builds)
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3D Printed

microion 21700
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Jodie Froster   Aug 20, 2021  

Super cool! How long do you think it took to wind a motor that size?

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Jodie Froster   Aug 25, 2021 

So i'm pretty uneducated here, I have noticed that retailers sell a motor in a few different kv's, but they all weigh the same. That has always confused me, as I was told that it was more, or less turns to change the kv. When you went up in kv, you did half the turns, did you use thicker wire? Also: do you think that the retailers are lying? Did you weigh yours by any chance (before and after...)?

packocrayons   Aug 26, 2021 

You use a heavier gauge wire. The intent is to fill the stator as much as possible, so you have to pick a wire gauge that works well for the number of turns you want. Termination also changes kV, so if the two different kV's are separated by a factor of 1.7, then they're actually the same wind, just a different termination. They may weigh different by a minor amount, but ideally they would weigh the same as they have the same amount of copper on the stator

Nabla   Aug 31, 2021 

The weight difference would be fractions of grams - more weight could be trimmed off by offering 5mm shorter motor wires that connect to your esc than if you were to add 5 more winds on each stator pole for these tiny motors.

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