[NSRCA-discussion] Help - Toasted ESC + Battery

[Ed Alt]

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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