Guys
Thanks so much for your responses. I see there are a lot of things I can check that I have not thought of.
I’ll respond to each of your questions and ideas:
ChrisIt could be heat but, it seems to do the same
on cool days as well.
I have had the logging turned off after initial flights so I don’t know the current temp of the controller. It was running about 100 degrees. I have the ESC suspended directly in the nose air inlet
I’ll log it again after I do Dean’s tests
The battery comes down cool on cool days and only slightly warm on 90-degree days. When warm I can put it on my cheek and not be burned-- Don’t have temp
Gage
CurareCharger is Thunder Power 610C –ACDC. It has a feature that will not allow charging to start if any cell is below 3..2 volts . I have not had a failure to charge—YET.
I’m charging at 3.6 A
WillPer your suggestion, I do not store the batteries charged. I do charge them the night before I plan to fly and if I don’t fly I discharge them
DeanI do balance every time I charge
Since I flew last night and the batt. had not yet been touched after the flight I checked the V/Cell
1) 3.7 , 2) 3.7, 3) 3.8 , 4) 3.8, 5) 3.8
I then charged the batt . it took 2106 MAH
V/ cell after charge: 1) 4.194; 2) 4.192; 3) 4.203; 4) 4.196; 5) 4.184
I’ll repeat this test Wed. night when I fly again
I had logging turned off . I now have it set to record volts and current for Wed flying
All wire is standard length except the ESC to motor wires that I shortened
I solder pretty well so I think the joint is good
All other wire came pre soldered and is covered with shrink tubing including the battery - all look ok from the outside-- No crimps in the system
Safety switch is Maxx products ,Deans connectors. All look clean not burned and I’ve swapped the plug out three times –just because
The power seems fine just before cut off is triggered. I do suspect something other than the battery
I’ll collect more data Wed night and report
The SW in the ESC is 3.27
Thanks again to all
Dick