You'll be just fine if there are propellers on the motors.

(11-Sep-2017, 07:22 AM)unseen Wrote: If you were using a 3S battery then the motor speed would not have exceeded the ESC's maximum of 300,000 eRPM. It would have got to 265,000 at the most.

From memory i thought the limit was ~250'000 eRPM on the old kiss escs... if that was the case, running a prop or not could have just made the difference. I'm not sure though, it's been a while, i might as well mix it up with my old ultra-escs.

Either way, full throttle desync sounds very plausible.

(12-Sep-2017, 09:32 PM)fftunes Wrote: From memory i thought the limit was ~250'000 eRPM on the old kiss escs... if that was the case, running a prop or not could have just made the difference. I'm not sure though, it's been a while, i might as well mix it up with my old ultra-escs.

I looked it up on their web site and the documentation for the old 12A ESC says max 300,000 eRPM with a recommended maximum of 270,000.

I've never used KISS ESCs before. Is there any way to adjust the ESC timing like there is on BLHeli?

I've racked my brains, but I can only come up with a catastrophic desync causing the ESC and motor to blow up.

(12-Sep-2017, 09:36 PM)unseen Wrote: I've never used KISS ESCs before. Is there any way to adjust the ESC timing like there is on BLHeli?

I've racked my brains, but I can only come up with a catastrophic desync causing the ESC and motor to blow up.

Oh you're faster answering than i am editing

No, Kiss escs can not be adjusted, especially the old ones. I think the 24a versions have some "secret" options that can be reached with an FTDI somehow, but not sure if timing can be changed on those.

Yeah i guess desync is most likely the reason.

(12-Sep-2017, 09:44 PM)fftunes Wrote: Oh you're faster answering than i am editing

Programmer's fingers. I can type much faster than I can write.

Goodmorning everyone

I felt ugly not to conclude.
arrived motors and new esc, dys ds20a, i did synchronize with a power supply with adjustable current limited to 2A.
I did three packs of batteries and nothing was burned.
flies perfectly.

Thank you all    

Wishing you Best of Luck this time Paolo