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HomeAircraftHelicopterHelicopter Main Discussion › speed control meaning?
01-01-2011 03:26 PM  7 years agoPost 1
ROGER543

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bristol ct usa

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what the difference with or with out a bec?? looking for one for a trex 500 and they list 2 of them with and with out a bec. which one do i need??

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01-01-2011 03:29 PM  7 years agoPost 2
GyroFreak

rrProfessor

Orlando Florida ...28N 81W

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The BEC is a Battery Eliminator Circuit. So you don't need a separate battery for servos and radio.

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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01-01-2011 03:30 PM  7 years agoPost 3
ROGER543

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bristol ct usa

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so then get the one with out the bec? just want it to be plug and play

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01-01-2011 03:32 PM  7 years agoPost 4
GyroFreak

rrProfessor

Orlando Florida ...28N 81W

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I use one with the BEC so I don't have to worry about charging the receiver/servo battery. Charge the main batteries and I'm done.

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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01-01-2011 03:35 PM  7 years agoPost 5
GyroFreak

rrProfessor

Orlando Florida ...28N 81W

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If you get the one with the BEC you don't have to use the BEC output, thus plug and play, but it will be there when you get tired of worrying if your recv battery is charged.

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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01-01-2011 03:35 PM  7 years agoPost 6
ROGER543

rrVeteran

bristol ct usa

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thanks that what i needed to know

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01-01-2011 03:39 PM  7 years agoPost 7
GyroFreak

rrProfessor

Orlando Florida ...28N 81W

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ROGER
If you get one with BEC and still use a recv battery, make sure you cut the red wire from the throttle servo, that's where the bec supplies power to the recv system.
With the bec it is plug and play, just remove the existing recv battery pack.
Which way do you think you will go ??

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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01-01-2011 03:59 PM  7 years agoPost 8
ROGER543

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bristol ct usa

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will get one that i don't need a seperate battery. i never had had a trex 500 before and i plan on running 6 s setup so don't know what kind of room i have. looking at a 80 amp one is that over kill or should i stick with a 60 amp one?

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01-01-2011 04:14 PM  7 years agoPost 9
GyroFreak

rrProfessor

Orlando Florida ...28N 81W

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I am not familiar with Trex 500 setup so not sure I can help on sizing the ESC but when it comes to an ESC I always go for overkill (price allowing). Make sure the BEC is rated for 6S (26V ?). I fly with 10S and had to get an separate external BEC since none of the ESC/BEC were rated for that high a voltage.

I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?

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01-01-2011 04:57 PM  7 years agoPost 10
McKrackin

rrProfessor

Lucasville,Ohio

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This thread is a little confusing to read.lol...

If you do not want to use a second battery for the receiver,you have to use the ESC with built in BEC.

If you want to use a second battery for the receiver,you want the ESC with no BEC.
But then you have to use a separate BEC or voltage regulator.
Or,use a 6.6 volt LiFe battery for the receiver.

A Trex 500 works best with an ESC with built in switching BEC.
A 60amp ESC is fine and an 80amp ESC is even better.

I literally never use the word literally right.

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01-01-2011 05:07 PM  7 years agoPost 11
Blik

rrApprentice

Ontario North

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This thread is a little confusing to read.lol...
Some ESC's come with a built in BEC but they may not be rated high enough(amps) to handle all your on board electronics power requirements. If you need more amps then you need a seperate BEC or RX battery.

The separate BEC takes power from the main battery, and plugs into any spare channel on your receiver. It drops the voltage to a regulated 5v (usually) suitable for the receiver and servos. That means you need to connect it, in parallel with your ESC, to the main battery plug.

The ESC plugs into the throttle channel on your receiver, as normal. If your ESC has an internal BEC, you normally need to disable it when you're using a separate BEC by pulling the red wire out of the plug that goes into the receiver, and taping it back on itself so that it can't touch anything.

Cheers
Blik

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01-01-2011 10:30 PM  7 years agoPost 12
dkshema

rrMaster

Cedar Rapids, IA

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The stock ESC with built-in BEC that ships with the Trex 500 works very well with either a 5S OR 6S setup.

It's a 70 amp controller for the motor and the built-in BEC works very well and can handle the electronics in your 500 without trouble.

http://www.align.com.tw/shop/produc...roducts_id=3506

The Castle Creations ICE 75 or ICE 100 would also be exceptional choices for the 500.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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