[NSRCA-discussion] Help - Toasted ESC + Battery

[Peter Vogel]

My OS ESC worked with my 28 pole Hacker Q60, but was extremely power
hungry.  A Jeti Mezon 90 works beautifully though!

Peter+


On Tue, Jul 15, 2014 at 9:52 AM, Ed Alt via NSRCA-discussion <
nsrca-discussion at lists.nsrca.org> wrote:

> It seems to be an issue with timing, i.e. keeping up with the required
> timing.  My Q80 would get hot, ran poorly and made done nasty noises until
> I switched to a Jeti Spin 99.
>
> Ed
>
> Sent from my iPhone
>
> > On Jul 15, 2014, at 12:49 PM, "Jeff and Claire via NSRCA-discussion" <
> nsrca-discussion at lists.nsrca.org> wrote:
> >
> > This is what puzzles me- Q80 is a 28 pole motor yet an ESC set for 28
> poles doesn't work with it.  Must be other factors in the design to cause
> incompatibility and I guess have to accept that.  Will check the connectors
> too, thanks.
> >
> > -----Original Message-----
> > From: NSRCA-discussion [mailto:nsrca-discussion-bounces at lists.nsrca.org]
> On Behalf Of Jon Lowe via NSRCA-discussion
> > Sent: Tuesday, July 15, 2014 10:14 AM
> > To: NSRCA
> > Subject: Re: [NSRCA-discussion] Help - Toasted ESC + Battery
> >
> > From everything I've heard and read, the Q80s don't like most escs
> except Jeti and Hacker/ Jeti escs.  I've been told they specifically don't
> work well with the OS esc's.  Sounds like ESC/motor incompatibility to me.
> >
> > I've also burned up an ESC when one bullet connector came loose between
> the motor and ESC. Make sure any connectors there aren't burned.
> >
> >> On Jul 15, 2014 11:01 AM, Jeff and Claire via NSRCA-discussion <
> nsrca-discussion at lists.nsrca.org> wrote:
> >>
> >> Unexplained ESC problems happened two weeks in a row-  any ideas why?
> >>
> >> Last week- motor shut off near end of flight as if ESC hit low voltage
> >> cutoff.  Only the ESC would not reset. Resulted in off-field landing
> >> and broken out landing gear.  Got to the plane and the ESC was doing
> >> the slow beep (which I think is normal when it's been left on and Tx
> >> is off) as opposed to the type of beep indicating it hit low voltage
> >> cutoff. Battery pack still had 26% remaining, no low cells.  Hacker
> >> Q80-11s, Castle HV80
> >> ICE2 (3 years old, unknown # flights), SkyLipo 4400
> >>
> >> So I repair the landing gear and install a new OS 1100HV ESC. 1st
> >> flight everything seems fine. Early into the second flight there's a
> >> loud screech during power-up after pulling from a vertical down line.
> Again, no power.
> >> (was not using brake, had not tried it yet).  Swung around to land and
> >> opened the canopy to find new ESC burnt to a crisp and battery toasted
> too.
> >> This time Hobby People 4500's, a month old with 15 cycles.  Checked
> >> balance connectors to find one 5s had one cell left, the other had 2
> cells left.
> >> Blobs of solder fell out as I removed pack from plane.  Not sure, but
> >> maybe these came from the soldered connections inside the pack. Can
> >> see a blob still stuck inside.
> >>
> >> Checked motor using same Castle ESC from last week, and it seems to
> >> run fine.
> >>
> >> Can what appears to be an operating motor cause an ESC to burn up? Can
> >> a lipo pack cause an ESC to burn up?
> >> Or did the ESC just fail and take the battery with it?
> >>
> >> Any ideas why this happened or how to avoid in future? Ok, all but the
> >> ones about switching to YS!  :) Jeff Worsham
> >>
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-- 
Director, Fixed Wing Flight Training
Santa Clara County Model Aircraft Skypark
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