4025 630 Screeching on Spoolup

[chucky21022010]

Im quite lost with this one. On spoolup the motor starts screeching so the best thing I would do is throttle down and up again for it to spoolup properly.This starts everytime I put on a new pack. The heli in question is a 600ESP with 70HV Esc Hobbywing running governor with vbar. Motor bearing was changed not so long ago with ceramic bearing, one way bearing on the heli is ok. This motor was flawless with my old CC85HV which is now installed on my 6HV. Any thoughts?

[parksy]

Is the pinion grub screw/s done up tight? Is esc on soft start? Is one way bearing round right way? If you spin blades backwards by hand, does the motor make grinding noise? Might be something stuck in there or something has been in and damaged inside.

[chucky21022010]

Managed to fix it, I changed my esc (hw 70hv) to a cc110hv which I purchased second hand and it spools up smooth now.

[GIXERMAN]

No screech, but now a possible fire, sorry couldn't help that one, glad you sorted

[chucky21022010]

Re: 4025 630 Screeching on Spoolup

No screech, but now a possible fire, sorry couldn't help that one, glad you sorted

It's ok, two of my hv versions of cc are phoenix not the ice version and been flying the 85hv on my 6hv for almost 300 flights now with no incidents.

[GIXERMAN]

I have a 160hv and couple of 120hv and have been reliable also