two fxr's two 3amp bec's why run an external

[klabeaume]

Originally Posted by bigemike

had a food orgasm eating king crab and bananna pudding

This sounds nasty, just saying

Hope you didn't mix up the orgasm with the pudding. That could ruin a good sea food dinner.

[bigemike]

it was so good, seriously

I can understand why these guys risk thier lives to catch these big crabs

[EeePee]

Feels good to delete 11 posts all at once.

Carry on with the BEC question/info.

[losikid]

Originally Posted by bigemike

There are alot of problems with for example the MMP that you would never see out of a tekin product. But if the Tekin guys say you can run it together, then it should be ok.

This is why people are being an ass,

a.)what makes the mmp inferior to the tekin? Both are great products, the fxr is just smaller.

b.)Yes, you can run them together but don't plan on there being double the current...lets say the internal bec did put out 3 amps on both of them, you won't get the extra 3 amps of power out of the 2nd esc until the first one is maxed out, and running at its max will put a serious strain on it and it'll generate alot of heat and burn up....

and the tekin guys said to run an external bec

Originally Posted by Ty@Tekin

But, the proper thing to do is put the external BEC on anyways. It's easier on the ESCs, plus if the BEC fails (which they do) it is more easily replaced and cheaper than a new FXR.

Yes they are regulated, but as voltage goes up, the amperage the BEC can supply goes down. If you're running 3S, no question you need an external that can provide a higher amperage.

[bigemike]

you do get double amperage and the amp draw should be even over the two esc's. there isn't any reason it would use all of one then goto the other. It would be an equal draw over both speedo's. How many servo's even draw 4+amps? I mean even a 300 oz servo should be fine at 4-5 amps which this setup could maintain all day.

And Tekin guys said it was fine, but run the bec if you want extra insurance and an easier to replace option if it did go bad.

But if you are looking to save weight there is no reason not to try it, I am not saying change to this before going to the nats, but there are prolly guys who have more than one rig that could try it out.

Also the MMP has a really weak bec and I would suggest running an external on it at all times. But I have found in my other tekin cars even with high powered 250oz servo's I have never needed a bec

[EeePee]

Originally Posted by bigemike

I mean even a 300 oz servo should be fine at 4-5 amps which this setup could maintain all day.

Maybe with 2S lipo input, but no one uses 2S.

And real servos are pushing 400 oz at 6.0v, then almost 500 oz at 7.4v. And that's what people are using, with 3S or more batteries.

[DISTURBIN' tha PEACE]

Originally Posted by bigemike

you do get double amperage and the amp draw should be even over the two esc's. there isn't any reason it would use all of one then goto the other. It would be an equal draw over both speedo's. How many servo's even draw 4+amps? I mean even a 300 oz servo should be fine at 4-5 amps which this setup could maintain all day.

And Tekin guys said it was fine, but run the bec if you want extra insurance and an easier to replace option if it did go bad.

But if you are looking to save weight there is no reason not to try it, I am not saying change to this before going to the nats, but there are prolly guys who have more than one rig that could try it out.

Also the MMP has a really weak bec and I would suggest running an external on it at all times. But I have found in my other tekin cars even with high powered 250oz servo's I have never needed a bec

Stop arguing, you are NOT going to win.

Go hook up your 2 FXR's & go play with it.

[bigemike]

people keep saying that you don't get double the amperage and that is flat wrong

You get double the amperage

[losikid]

Originally Posted by bigemike

you do get double amperage and the amp draw should be even over the two esc's. there isn't any reason it would use all of one then goto the other.

Yes there is a reason, but since you don't want to read, there's no use of posting it a 3rd time.

Originally Posted by bigemike

It would be an equal draw over both speedo's.

No it wouldn't be...

Originally Posted by bigemike

How many servo's even draw 4+amps? I mean even a 300 oz servo should be fine at 4-5 amps

Many of the high torque servo's stall out at and pull about 5 amps

Originally Posted by bigemike

which this setup could maintain all day.

Although its rated at that, its not ideal to be running a regulator at its max output

Originally Posted by bigemike

And Tekin guys said it was fine, but run the bec if you want extra insurance and an easier to replace option if it did go bad.

Yea, its fine to run the two together, just don't run a high draw servo off them as. The high draw servo is what burns up stuff...

Originally Posted by bigemike

But if you are looking to save weight there is no reason not to try it, I am not saying change to this before going to the nats, but there are prolly guys who have more than one rig that could try it out.

The reason not to try it is the potential of burning up a $100 esc

Originally Posted by bigemike

Also the MMP has a really weak bec and I would suggest running an external on it at all times. But I have found in my other tekin cars even with high powered 250oz servo's I have never needed a bec

You may run 250 oz servo's all the time off a tekin internal bec, but i bet those servo's aren't constantly being stalled out like they are on a crawler


I have burnt up a fxr thinking the same thing you are, get an external bec and save yourself $80 in the future

[Duuuuuuuude]

Originally Posted by bigemike

but there are prolly guys who have more than one rig that could try it out.

I thought you were "100% sure". Why don't you try it with your own rig?

Originally Posted by bigemike

people keep saying that you don't get double the amperage and that is flat wrong

You get double the amperage

T-h-e-o-r-e-t-i-c-a-l-l-y. As its been said before, there have been many people who have been down that road and ended up with horrible performance or a fried esc. I'm sorry I can't sprinkle that with complicated technical jargon, but its the simple truth. I don't think there is a person on this board that would not absolutely love to be able to tie their two internal becs together and ditch the external unit, but at this point in time it is not possible.

Originally Posted by losikid

Yes there is a reason, but since you don't want to read, there's no use of posting it a 3rd time.

I'm starting to think this guy is just a troll...

[Meatwad]

Originally Posted by Duuuuuuuude

...I'm starting to think this guy is just a troll...

Gotta be. Gettin a bit long in the tooth he is

[bigemike]

Cool, I understand what you are saying. I have a hobbico c 170 servo which is about 300 oz servo, and I will prolly upgrade from that for my xr and toss that in my scx10. I will be adding a bec to it, that was never the point. I just got to thinking, and stirred up a hornets nest. Obviously this has been dealt with many times before because you all are passionate about it. It just seemed like over kill to run a bec but let me say

I GOT IT, I UNDERSTAND run the bec

I just got aggravated when people started to say that the total amperage wouldn't increase when both where plugged in. When indeed it does.

But simple truth is there is no way to get 7.4 volts to run this TowerHobbies.com | FUTBLS157HV BLS157HV Futaba BLS157HV High Voltage Ultra Torque Servo
without a bec. Again wasn't trying to make a 75 post thread in 20 hours when I started this, lol

[Charlie-III]

Originally Posted by kicker

But simple truth is there is no way to get 7.4 volts to run this TowerHobbies.com | FUTBLS157HV BLS157HV Futaba BLS157HV High Voltage Ultra Torque Servo
without a BEC. Again wasn't trying to make a 75 post thread in 20 hours when I started this, lol

Run a 2S LiPO (or similar voltage alternative battery chemistries) in the rig and wire the servo power leads to the battery. This bypasses the ESC internal BEC and does not require an external BEC.

[losikid]

Originally Posted by Charlie-III

Run a 2S LiPO (or similar voltage alternative battery chemistries) in the rig and wire the servo power leads to the battery. This bypasses the ESC internal BEC and does not require an external BEC.

Or tap into the balance plug of a 3s battery (Make sure to balance charge each time though)

[EeePee]

Originally Posted by bigemike

Again wasn't trying to make a 75 post thread in 20 hours when I started this, lol

If you had fun, then RCC wins again.

[bigemike]

yeah that would scare me considering I am running a 480mah battery. I would prolly just add the castle bec.

Originally Posted by EeePee

If you had fun, then RCC wins again.

lol yeah fighting on the internet, I must have no life, lol

no one ever wins, but I feel like I got jumped into a gang or something everyone got a kick in

[EeePee]

BTW, RCC never loses.

[Duuuuuuuude]

Originally Posted by bigemike

I just got aggravated when people started to say that the total amperage wouldn't increase when both where plugged in. When indeed it does.

IF IF IF IF IF the components are designed to work in unison. I'm sure that out there somewhere there are power supplies that will do such a thing, but in our corner of the world they do not.

Nearly every time I've seen someone hook two of something electronic in nature together to get more power resulted in something going bye-bye in a bad way. Batteries are the exception to that...

Theory vs Reality. The only time theory can win is if it coincides with reality, even then, reality still wins.

[Cordwood]

I've got three Novak Rooster power wires all tied together on a 6x6, powering two servos. They all work great, but only because I yelled at them and they're afraid of me.

[Sydwall85]

Fixed it for you

Originally Posted by SMR 510RR

I am no electrical engineer, but I did stay at a Holiday Inn Express last night.......