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Old 04-18-2012, 05:53 PM   #1
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Default Servo Amp draw?

Just curious what an rough estimate is for the average amp draw for a 255oz/in steering servo would be in a Rustler that probably weighs twice as much as a normal one. Im running that and my RX and a gyro all three off of a 3A (5A max) BEC. The BEC gets very very warm but not so hot that its worried me yet. What I am worried about is it eventually failing because of high Amp draws eventually wearing it out. Should a very warm BEC worry me that I should get a bigger one or is that fine?
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Old 04-18-2012, 06:00 PM   #2
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you might want to go with the castle bec, it's 10A I believe.
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Old 04-18-2012, 06:04 PM   #3
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Quote:
Originally Posted by vw addict View Post
you might want to go with the castle bec, it's 10A I believe.
The thought had crossed my mind. I dont want to be in the middle of a speed run and have the BEC fail on me. IDK if its warm enough to but I almost hate to even chance it.
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Old 04-18-2012, 06:42 PM   #4
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If you are doing speed runs and need to add weight, You may even want to think of an external BEC and RX pack. It will help keep the current draw off the main pack as well leaving more for the motor. Other than that, I would go with the CC BEC.
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Old 04-18-2012, 10:55 PM   #5
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Hmmmm I could fit an RX pack in the kit rather easily. I wouldnt even need an BEC then
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Old 04-18-2012, 10:56 PM   #6
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I built a high speed Rustler and Im just wondering if anyone has any tips for keeping it in a straight line and stopping it with out it going out of control?
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Old 04-19-2012, 11:20 AM   #7
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Ok, so I pulled out the ol multimeter last nigh and made some wires to connect the two plugs together yet leave a surface exposed to use my multimeter to measure the amp draws. the RX and fan together were only .02A and my 255oz/in .13sec servo only pulls about .95 max under a load. Under normal use it only pulls about .5A so the 3A BEC should be enough. Im not sure why its even getting warm unless they all get warm when in use? or maybe because its hooked up to a 6S lipo? At any rate I just thought Id share my findings with you guys.
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Old 04-19-2012, 11:26 PM   #8
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Its because your running a 6 cell battery. The BEC has to reduce that high
voltage down to safe voltage for the reciever. In doing that creates heat.
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