Hello,

For the first time since I started flying electrics in 2006 I was not able to log a few flights due to issues with the power system. In essence, the motor would spool up to about 20% of power and then wind down. After the first attempt, the ESC, a Castle HV85, started to beep. My first reaction was that the batteries were not properly charged. Checked voltages, they were O.K., but decided to try a different pack just to be safe. Same thing happened again. On the second attempt, the motor would stutter a little bit before winding down. My first reaction was that maybe the ESC settings had been erased but it also occurred to me that maybe it was a blown capacitor. On the second attempt I did noticed that the spark did not seem very robust.

So, I will be checking the ESC settings as well as the connections to make sure that they are in order. If those check out O.K. would a blown capacitor be a good guess?

Thanks,

Teo