I noticed this attention-grabbing 1S 3-inch FPV drone utilizing 18650 Li-Ion cell for lengthy vary, and I needed to give it a attempt myself 🙂 I’ll share my somewhat unlucky try and what it is best to look out for if you wish to construct this too.
I really like the concept which you could simply slap a 18650 battery on this quad and fly for a really very long time 🙂 And it’s tremendous gentle too, solely about 50g with out battery.
New to lengthy vary? Check out my recommendations on lengthy vary FPV flying.
Original design by Dave_C_FPV: https://www.thingiverse.com/factor:4769576
I’m utilizing this remix of the unique body, so I don’t want the battery tray (to save lots of weight and value): https://www.thingiverse.com/factor:4786123
The remixed body wants battery contacts (with dimension 13.5×11.5mm), one thing like these: https://amzn.to/31n6iQc
Recommended elements listing:
I used the next elements as a substitute, just because I have already got them, not as a result of they’re higher:
Credit to Dave_C for this wiring diagram.
It took me round 6 hours to construct this nano lengthy vary 3-inch, it was the soldering and determining methods to mount every part within the restricted area that took the longest.
Soldering these tiny parts could be a bit difficult and requires regular fingers and good solder instruments 🙂 Check out my really helpful soldering instruments right here.
The weight is about 50g with out 18650 cell.
My first try wasn’t profitable although, the quad didn’t have sufficient energy, and couldn’t even raise off the bottom. My first suspicion was the battery spring that isn’t ok to ship energy from the 18650.
So as a substitute of soldering the wire to the little tab, I soldered it proper within the centre of the plate and the tip of the spring, the wires now have straight contact with the battery’s terminals, this could decrease resistance.
Or you can get this form of battery contact which has significantly better efficiency: https://amzn.to/3tTTkWr
And that was sort of a hit, the quad can now hover! It hovers at about 50% throttle and it flies higher than I assumed.
However, as quickly as I transfer the throttle too rapidly, the quad at all times drops out of the sky, and I might hear the ESC restarting chirp.
To examine, I attempted a standard 1S 300mAh LiPo on this quad, and it flies simply positive! No extra drop out.
So two attainable causes for this downside I believe:
- the 18650 battery I’m utilizing isn’t ok (unlikely)
- the iFlight AIO FC can’t deal with the voltage sag/fluctuations of the battery (extra seemingly)
I’m going to get some model new VTC5A and check out once more simply in case. In the meantime, I’ve additionally ordered the very same HGLRC Zeus5 1S AIO FC that Dave_C utilized in his construct, if the brand new 18650 doesn’t work then I’ll change the FC.
Update (25/03/2020): I attempted to replace the ESC firmware tonight (downgrade really, it was on 16.80, and I wished to place 16.73 on it), however one way or the other it “bricked” the ESC, and now they don’t do something after I plug within the LiPo, I additionally get “Flash Failed” error after I attempt re-flash them. Probably useless useless. Guess I will likely be changing the FC in any case 🙂
Stay tuned for extra 🙂