RCCrawler Forums

alexchen86 · 02-21-2011, 04:50 PM

Well my BRXL just came in the mail today along with a 35T pro wound. The BRXL has a 6V switching BEC.

So does this mean that I do not need an external CC BEC to run my servo at 6V continuously?

Erin · 02-21-2011, 04:56 PM

You might not on 2cell but definitely on 3cell

articzap · 02-21-2011, 04:56 PM

If it's a comp rig or a servo over 300 oz, run a CC BEC.

ittybitty · 02-21-2011, 05:00 PM

The BRXL has one of the strongest, if not the strongest internal BEC's out there. It is, like you said, rated at 6V but at 5 amps. The CC BEC is able to be programmed to different voltages, but is also capable of putting out 10 amps as well.

and x2 on what articzap said!

alexchen86 · 02-21-2011, 06:42 PM

Well the rig is pretty heavy it's a TTC topping in around 11 pounds rtr. At the moment I want to try 4S with the current 55T Integy pro lathe and see if I'm happy with it.

Steering servo broke on me last comp when I was just testing. Damn Tower Pro 995! I guess you get what you pay for...now I have a spare JR NES-2721 on there which is meant for heli's I think but at 6V it pushes out around 148oz.

Definitely will wait until I have enough money to get a better servo.

Manning · 02-21-2011, 06:45 PM

Here I go again with the dissenting opinion, but I'm running a BRXL on a shafty with Futaba 3197 steering servo (425inoz) and it used to have a 225MG dig servo, with no issues. My XR10 is running a JR 8711 with no issues. Plenty of steering power. And yes I'm running 3s lipos.

My opinion is that you don't need a BEC. The killer BEC is the #1 reason to own the BRXL. If you put a BEC on it, you might as well bought a CC Sidewinder and save a few bucks.

dynamaxxed · 02-21-2011, 09:47 PM

i agree with manning, I bought the brxl because of the bec in it. I am running a 7955tg on mine and its great and Im running 3s also. My bully is heavy, i havent done anything to shave weight off of it either. I really like it, thats reason i hate im having to sale it. But, maybe later I can pick up another one. But the brxl is great

53 willys · 02-21-2011, 11:53 PM

Quote:

Originally Posted by alexchen86

Well the rig is pretty heavy it's a TTC topping in around 11 pounds rtr. At the moment I want to try 4S with the current 55T Integy pro lathe and see if I'm happy with it.

Steering servo broke on me last comp when I was just testing. Damn Tower Pro 995! I guess you get what you pay for...now I have a spare JR NES-2721 on there which is meant for heli's I think but at 6V it pushes out around 148oz.

Definitely will wait until I have enough money to get a better servo.

the BRXL on 4s will need a external BEC...

..3s or 2s you might could get by but on 4s the BRXL BEC is just way to weak for most crawling or TTC rigs..

articzap · 02-22-2011, 05:09 AM

Quote:

Originally Posted by Manning

My opinion is that you don't need a BEC. The killer BEC is the #1 reason to own the BRXL. If you put a BEC on it, you might as well bought a CC Sidewinder and save a few bucks.

the reason to buy the brxl is for the Holmes hold.

bpd964 · 02-22-2011, 05:15 AM

Run a BEC... It's cheap insurance and piece of mind and once you get one, you'll be happy you did and will understand quite clearly after you do...

Go for the bec..!

JeremyH · 02-22-2011, 07:10 AM

Quote:

Originally Posted by articzap

the reason to buy the brxl is for the Holmes hold.

Agreed!

Alex, what truck is this going into??

Manning · 02-22-2011, 07:47 PM

What's the advantage of the Holmes hold? My rig will hold itself in place on inclines with just drag brake.

Scattman · 02-23-2011, 06:43 AM

Quote:

Originally Posted by Manning

My opinion is that you don't need a BEC. The killer BEC is the #1 reason to own the BRXL. If you put a BEC on it, you might as well bought a CC Sidewinder and save a few bucks.

You forget about the 6S limit and the Holmes Hold.

The Sidewinder is a great ESC but not quite what the BR-XL is.

I have stalled out my 7950 quite a few times on the internal BEC of the BR-XL. There are many others as well that have found the same thing.

JeremyH · 02-23-2011, 06:47 AM

Quote:

Originally Posted by Scattman

I have stalled out my 7950 quite a few times on the internal BEC of the BR-XL. There are many others as well that have found the same thing.

Scattman brings up another good point.....there are a lot of servos out there that can take 7.4V....the lightest route to give this type of voltage to the servo is using an external BEC.

marvinbeaverdip · 02-23-2011, 07:22 AM

Quote:

Originally Posted by 53 willys

the BRXL on 4s will need a external BEC...

..3s or 2s you might could get by but on 4s the BRXL BEC is just way to weak for most crawling or TTC rigs..

I'm hoping someone can explain why this would be. Why would an internal BEC become LESS capable as the input voltage goes up? the demand from the servo stays the same regardless of the input voltage. I've heard this before, but just don't understand it. I'm considering getting a BR-XL too, and the internal BEC was one of the selling points for me. Incidentally, this will be running a hsr-5995tg

02-21-2011, 04:50 PM	#1
alexchen86 I wanna be Dave Join Date: Nov 2009 Location: Houston Posts: 2,004	BRXL Question - BEC? Well my BRXL just came in the mail today along with a 35T pro wound. The BRXL has a 6V switching BEC. So does this mean that I do not need an external CC BEC to run my servo at 6V continuously?

02-21-2011, 04:56 PM	#2
Erin I wanna be Dave Join Date: Dec 2006 Location: Goin broke losing weight..... Posts: 2,262	You might not on 2cell but definitely on 3cell

02-21-2011, 04:56 PM	#3
articzap RCC Addict Join Date: Sep 2006 Location: Depew Posts: 1,551	If it's a comp rig or a servo over 300 oz, run a CC BEC.

02-21-2011, 05:00 PM	#4
ittybitty I wanna be Dave Join Date: Oct 2008 Location: Sumter Posts: 6,141	The BRXL has one of the strongest, if not the strongest internal BEC's out there. It is, like you said, rated at 6V but at 5 amps. The CC BEC is able to be programmed to different voltages, but is also capable of putting out 10 amps as well. and x2 on what articzap said!

02-21-2011, 06:42 PM	#5
alexchen86 I wanna be Dave Join Date: Nov 2009 Location: Houston Posts: 2,004	Well the rig is pretty heavy it's a TTC topping in around 11 pounds rtr. At the moment I want to try 4S with the current 55T Integy pro lathe and see if I'm happy with it. Steering servo broke on me last comp when I was just testing. Damn Tower Pro 995! I guess you get what you pay for...now I have a spare JR NES-2721 on there which is meant for heli's I think but at 6V it pushes out around 148oz. Definitely will wait until I have enough money to get a better servo.

02-21-2011, 06:45 PM	#6
Manning RCC Addict Join Date: Nov 2006 Location: Lowell, Arkansas Posts: 1,307	Here I go again with the dissenting opinion, but I'm running a BRXL on a shafty with Futaba 3197 steering servo (425inoz) and it used to have a 225MG dig servo, with no issues. My XR10 is running a JR 8711 with no issues. Plenty of steering power. And yes I'm running 3s lipos. My opinion is that you don't need a BEC. The killer BEC is the #1 reason to own the BRXL. If you put a BEC on it, you might as well bought a CC Sidewinder and save a few bucks.

02-21-2011, 09:47 PM	#7
dynamaxxed Quarry Creeper Join Date: Mar 2005 Location: tuscaloosa Posts: 211	i agree with manning, I bought the brxl because of the bec in it. I am running a 7955tg on mine and its great and Im running 3s also. My bully is heavy, i havent done anything to shave weight off of it either. I really like it, thats reason i hate im having to sale it. But, maybe later I can pick up another one. But the brxl is great

02-22-2011, 05:15 AM	#10
bpd964 Quarry Creeper Join Date: Mar 2010 Location: Bridgeport, CT Posts: 280	Run a BEC... It's cheap insurance and piece of mind and once you get one, you'll be happy you did and will understand quite clearly after you do... Go for the bec..!

02-22-2011, 07:47 PM	#12
Manning RCC Addict Join Date: Nov 2006 Location: Lowell, Arkansas Posts: 1,307	What's the advantage of the Holmes hold? My rig will hold itself in place on inclines with just drag brake.

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