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BrianG
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02.01.2008, 02:34 AM

Yeah, at 5s, you most probably fried the BEC. I would always use an external UBEC at anything over 2s or 7 cells. At 5s and a 3A servo load, that's 37.5 watts that has to be dissipated and the BEC is not even attached to a heatsink!

Some people say you can use hte built-in BEC up to 3s, but I've run tests before and the BEC heated up fast with just a very small load at 3s.
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4s should be OK
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ilpufxit
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4s should be OK - 02.01.2008, 09:56 PM

I'm not saying it is, but I just re-read the instruction manual that came with my Quark. It says "over 4s a BEC is required". I didn't think I was that much of a stooge. I'll be running external BEC's from now on just to be safe.

I did have a super high torque digital steering servo in my E-Maxx when the Quark blew but I never gave it more than 4s.
   
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Patrick
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02.01.2008, 11:17 PM

Quote:
Originally Posted by ilpufxit View Post
I'm not saying it is, but I just re-read the instruction manual that came with my Quark. It says "over 4s a BEC is required". I didn't think I was that much of a stooge. I'll be running external BEC's from now on just to be safe.

I did have a super high torque digital steering servo in my E-Maxx when the Quark blew but I never gave it more than 4s.
Yeah I saw that in my manual yesterday as well. I remembered it said 10 cell nimh, but I couldn't remember how many lipo.
It's strange that it only says 10 cell nimh, but 4s, because 4s is more like 12 cells. I think they should have said 10 cells and 3s.


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