@adityapruthi01, if possible with your charger you can try first just to balance the three cells. If this is not possible you can try to unload only cell 1 and 3 to 3,6V with a small load over longer time. As load you can use a small 6V light blub. Than you can try to load and balance.
But unfortunately, it is very likely that the 2. cell was already discharged too deeply during the flight attempt and was therefore irreversibly damaged
Hi,
My recommendation would be to read about lipo batteries, buy a decent charger and a lipo voltage checker. This will provide you with the necessary information to enjoy this beautiful hobby.
Everything else is just putting your drone, your self and any people in the neighborhood at risk.
Best regards,
Maarten
Hi All,
I ended up getting another battery. Now I tried again to give throttle but again the quad tipped backwards and crashed did not even lift. I was in stabalize mode. I checked that the battery levels were above 8.2.
https://drive.google.com/drive/folders/1Gv4Bb8WlMuELfAB41wAF7tMBjxq7MjGl?usp=sharing
I don’t know where you are getting your batteries but this one is sagging to ~8V on that take-off attempt. And it doesn’t look fully charged when you started. I would say you are in the same place you were 10 months ago.
Dave, all 3 cells show 4.20 when full, and this time also have the original Sky RC balance B6 v2 charger. What can go wrong?
Post a photo of this battery and perhaps the entire craft… Did you calibrate the voltage sensor in Mission Planner using a voltmeter?
And are you sure the Motor Order and direction is correct using Motor Test?
Is the Pitch Channel on the Radio going the right way on the Radio Calibration Screen?
What exact ESC’s and Motors are you using and what size props?
Hopefully they don’t look like these:
Hi dave,
Did another flight just 2 miniutes ago,
This is what it shows:
1-03-2024 07:47:30 PM : PreArm: Battery failsafe
01-03-2024 07:47:30 PM : PreArm: Logging failed
01-03-2024 07:46:59 PM : PreArm: Battery failsafe
01-03-2024 07:46:59 PM : PreArm: Logging failed
01-03-2024 07:46:28 PM : PreArm: Battery failsafe
01-03-2024 07:46:28 PM : PreArm: Logging failed
01-03-2024 07:45:57 PM : PreArm: Battery failsafe
01-03-2024 07:45:48 PM : Vibration compensation OFF
01-03-2024 07:45:33 PM : Battery Failsafe - Disarming
01-03-2024 07:45:33 PM : Battery 1 is low 10.47V used 112 mAh
01-03-2024 07:45:28 PM : Glitch cleared
01-03-2024 07:45:23 PM : Vibration compensation ON
01-03-2024 07:45:17 PM : GPS Glitch or Compass error
01-03-2024 07:45:00 PM : Glitch cleared
01-03-2024 07:44:49 PM : EKF variance
01-03-2024 07:44:49 PM : GPS Glitch or Compass error
01-03-2024 07:41:28 PM : Glitch cleared
01-03-2024 07:41:17 PM : GPS Glitch or Compass error
I’m attaching some photos of the quad and a video for your reference.
Also, yes, these are my motors with which I successfully made several flight few months back. If these are the problem i will replace them just wanted to get sured. My college doesn’ provide enough funds for my project. I have seen many people achieving stable flights with these motors and eac. I don’t want it to be super stable, just like 6 months back when i was atleast getting few minutes in the air.
Latest Log is 26.
Thanks and regards.
https://drive.google.com/drive/folders/1Gv4Bb8WlMuELfAB41wAF7tMBjxq7MjGl
Well, that craft is a poster child for how not to build a multirotor today. But, some comments, questions:
There is insufficient thrust to take-off that appear to be battery related:
Or it could be low thrust/weight in general. What is the take-off weight with battery and what props?
Again, what battery is it?
The screen shot of the Battery Monitor page tells me nothing. Did you calibrate it with a voltmeter?
Please answer the questions asked.
Hi dave,
The take off weight is 900gm, with battery. I am using 1045 inch props. Battery is a 2200 mah 11.1 volt 3 cell battery. I do not know the C rating. Yes, I did calibrate the battery with a voltmeter, and the mission planner screen shows correct battery on the HUD.
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Also, what are these? Compass and GPS related glitches? I never had them before? Also, My FC is mounted on top of the quad, this is similar to what i did 6 months back when I achived a stable floght. But this one just doesn’t seem to get stable. And the matter of fact that all components are same. Basically we had 2 seperate kits, I made one and that was stable. This one is never stable.
Why do you refuse to post a picture?
At that weight (900g) with a good battery it should easily fly and hover for ~10-12 minutes. So I think your battery is still the problem.
Don’t worry about GPS glitches at this point. It’s not important if the craft cannot fly.
And get rid of the tether and never use one.
I would suspect a Lipo battery that doesn’t have the C-rating shown.
@amilcarlucas I have posted all pictures in the same google drive link kindly check once.
@dkemxr even when the battery shows 12.6 volts and tops up can still there be problem? I mean is a battery going not bad only limited to the amount of charge it can top up to? Coz previously I have had experiences where the battery’s 1 cell destroys and that battery is bad. Now even if all 3 cell are topping up. Can there still be a problem. Just want to make sure there isn’t any problem apart from this. Because I will again have to ask for funds from college and will again take some time.
No 3S 2200mah Lipo should sag to 8.2V on take-off with the components and weight on this craft. The motors, ESC’s and props are junk but they are close enough in spec for a “standard” F450 to fly.
@dkemxr Also, this was the same battery(identical), i used when i had the stable flight for 10 mins on kit 1. (all identical componets)
Will a 3 cell 30C 3300 mah be good enough? I don’t know I think there is something else wrong, like a motor, or the tune. When the quad tips it produces enough power, which i think the battery is able to provide considering this was the same one used earlier with the same confiuration. Is there anything else @dkemxr that could cause this? Like a bad FC maybe? Obvioulsy I will be ordering another battery that you will suggest.
Take off the props and run Motor Test In Mission Planner on each motor individually. Start at 5% throttle and increase this in 20% increments up to 100% and get a sense if all motors are behaving the same. This won’t be definitive as they are unloaded but it might tell you something.
Alas, I did that, all 4 motors behaving correctly. Be it 5% or 100%. Also, the Radio is well calibrated pitch up causes the drone’s behind 2 motors to create extra power. And likewise for Pitch down and Roll.
Is 3300 mah 30C 3 cell good enough?
Yes, sure it is. Could the props be slipping on the collet adapters? Those should really not be used.