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Old 02-03-2012, 10:23 PM   #1
PeeMax
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Default Separate SBEC

Is it a good idea to use a separate SBEC instead of a built in ESC UBEC?
I have a 50A 3a Red brick esc and I want to use at least 6 hxt900 servos + led lights + gps but I was told it can't handle them (even though I used 5 of them once on a 2a ubec for months last summer )
I have this SBEC: http://www.hobbyking.com/hobbyking/s...2V_input_.html
I would also need to cut some wire on the ESC right?
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Old 02-17-2012, 06:43 PM   #2
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I would agree with the others, 6 servos+gps+ lights will over extend a 3A Bec. the 4-5A you show would be a much better choice. the lights and gps likely use as much current as the servos, just asking for a shutdown IMO.
You do not ever have to cut the red wire, simply remove from the connector and tape back, it could be replugged again for future use. flying-barely
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Old 02-17-2012, 08:17 PM   #3
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Originally Posted by PeeMax View Post
Is it a good idea to use a separate SBEC instead of a built in ESC UBEC?
I have a 50A 3a Red brick esc and I want to use at least 6 hxt900 servos + led lights + gps but I was told it can't handle them (even though I used 5 of them once on a 2a ubec for months last summer )
I have this SBEC: http://www.hobbyking.com/hobbyking/s...2V_input_.html
I would also need to cut some wire on the ESC right?

IMHO, switching BEC's are mandatory for any model with more than a two cell LiPo battery. It's just to much of a risk of the linear voltage regulators shutting down, causing loss of the model. Two good ones that I've used are the Castle Creations 10 Amp uBEC, and the Common Sense uBEC. Both weigh fractions of an ounce.

Take a look:
http://www.wattflyer.com/forums/showthread.php?t=63779

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Old 02-17-2012, 09:15 PM   #4
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I had it figured out already but thanks anyway guys
I will probably buy a 10 amp one soon in case I decide to add flaps as well
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Old 02-17-2012, 09:55 PM   #5
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Originally Posted by PeeMax View Post
I had it figured out already but thanks anyway guys
I will probably buy a 10 amp one soon in case I decide to add flaps as well
I've got a half dozen of the CC 10 Amp uBEC's. They've been load tested to shut down, mine didn't shut down till they hit 14 Amps on the 5 VDC output, at 21 VDC on the input.

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