I made two flights with a fixed wing with two different 10.000 mah 6S Lipos without problems. After that I wanted to make a flight with a third 10.000 mah Lipo and when I gave throttle, the motors didn’t have much power, almost none. I took out the the Lipo, checked the voltage and it seemed OK.
Back home, watching the Dataflash logs, I saw something strange with the third lipo. The voltage was OK with motors off, but when I gave throttle, the voltage drop to 5-6 volts.
This is the voltage from the log:
Is it an indicator of a faulty lipo? Or maybe I have to look for another parameters or components? That day was hot, about 35º C, I don´t know if it has something to do with the problem.
I don’t have that Lipo to test now, but with another one it´s working OK and the motors have the normal power.