[NSRCA-discussion] [Fwd: RE: Fried ESC]

[glmiller3 at cox.net]

I just got this from Justin at Hobby Lobby
> 
> From: "Justin Smith" <justin.smith at hobby-lobby.com>
> Date: 2006/01/09 Mon PM 12:14:26 EST
> To: "George Miller" <glmiller3 at cox.net>
> Subject: RE: Fried ESC
> 
> Hello,
>  
> With the setup that you just told me about, at half throttle, where you were likely to have taken off, you were still within specs for the motor and controller.  However, with this setup, you will pull 185 amps or so at full throttle.  The 32-3 really does not need a 10 cell lipoly to make the power it needs.  In fact, at that high of a voltage, you will have to run an 11x7 prop to drop the amp draw down to specs.  You will need to run a carbon fiber electric prop to handle the RPMs it will spin and the pitch speed will be very high.  If I was going to fly this plane with this motor where I could do 3d as well as pattern, I would use a 15X8 prop and 6 cell setup, that gets full throttle down to about 77 amps.  I show you still get good speed and about 14 pounds of static thrust.
>  
> 
> Thanks, 
> Justin Smith 
> Sales Team/Customer service 
> Hobby Lobby International Inc. 
> 615 373-1444  ext 221 
> 
> -----Original Message-----
> From: George Miller [mailto:glmiller3 at cox.net]
> Sent: Saturday, January 07, 2006 5:35 PM
> To: sales 
> Subject: Fried ESC
> 
> 
> Hello,
>  
> I just tried a new Jeti 77 opto plus ESC which I purchased from you with an Actro 32-3 motor.  I had it connected to two 5s4P thunderpower 5300mah packs in series (10Cell lipo).  The Actro is on a Showtime 4D with a 17X12 electric APC prop.  I just made this conversion and this was it's first flight.
>  
> On Take-off, the plane accelerated and took off, beautifully, I turned 180 degrees down wind and pulled to verticle to see how much power I had.  after climbing about 100 feet, the ESC fried...white smoke trail- and the motor quit.  I landed without further mishap and found that the ESC had clearly burned up taking the covering of a battery pack with it.  The covering of the UBEC was fried but the guts must have been sturdy enough to survive the fire, because I was able to land without loss of receiver power.  
>  
> I am new to electrics and I'm anxious to learn.  As far as I can tell, the motor and controller should have functioned with this configuration ...if not, please advise me what controller I need to make this work.  If this is just a bad controller, I'll send it back to you for replacement.  Is there any way to test this on the ground so that I don't fry it in the air?  
>  
> Thanks, 
> George Miller
> 
> 
>