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Old 08-02-2004, 05:05 PM   #1
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Default 5v vs 6v BEC - huge difference?

For a casual club racer, I was just wondering if there is really a big difference between an ESC that puts out 5V BEC against 6V BEC?
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Old 08-02-2004, 06:08 PM   #2
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Your servo speed is affected by the input voltage. So I guess, there is a difference.
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Old 08-02-2004, 06:30 PM   #3
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Besides the servo speed, anything else is affected? I would think loosing .02 sec is a minute difference.
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Old 08-02-2004, 06:33 PM   #4
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Let me rephrase that, your servo's speed and torque are proportional to the input voltage.
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Old 08-02-2004, 06:35 PM   #5
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Your servo can run up to 40% slower at 4.8V vs. 6.0V.

I used to overdrive my servos a little bit when I competed in robotics competition because reaction time meant winning, and I liked winning.
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Old 08-02-2004, 06:47 PM   #6
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Donoman,

I could believe you on robotics competition, those stuff have a lot more mass than on road cars. The same is true probably with Off-road trucks. It would only make sense that you use the fastest speed and highest torque that you can put in there. But with on road cars, cars now a days are so light that i think you can get by with a minimal amount of torque.


I'm taking for example an airtronics 94357, it's got 100 torque and speed of 0.09sec @ 4.8v. Then 125 torque and speed of 0.07 sec. @6.0v

How does this equate now to the new radios that have High Response System (HRS) such as KO's?
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Old 08-03-2004, 01:56 AM   #7
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Good steering servos are one of the most overlooked hop-ups, in RC touring cars. Yet it's very important.

It's the difference of being able to countersteer through a chicane, or not.

Take a look at this Hitec HS-525BB servo;

Speed 4.8/6.0v : 0.17 / 0.13 second
Torque 4.8/6.0v : 46 / 57 oz. 3.3 / 4.1 kg

Torque wise, you get around 10 oz / 1 kg extra, with 6 volt BEC. And the speed is quite interesting too.

Personally, I find a servo cant be fast enough.

The good thing about buying good steering servo / ESC's with 6 volt, is that they can be taken to the next car. So it's an investment, which last much longer than most other equipment in this hobby.

A good bang for the buck ESC, is the DuraTrax IntelliSpeed 8T Pro Racing Forward ESC . Actually, it's a rebadge Novak TC2. It goes for 80$ at tower.
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