Dual brushless motors

[SpeedFreak_86]

Is there a brushless esc that's made for two motors? If not how would you make two esc's work together??

[kookie_guy]

No there is not. You have to run a separate ESC for each motor. You simply run both ESC's off the throttle channel in parallel. You can use a Y harness, or on the spektrum MR3000 receiver they provide 2 throttle ports.

[Doby]

I've never seen a controller for twom motors...to make them run together, you need a Y harness to connect the two contollers to the reciever.

[sailr]

As I recall, you have to disable the BEC on one of the controllers? Can anyone verify that? Otherwise, too many volts going to the receiver?

[questtek]

You might want to look at this thread, (and possibly do your own experiments to verify as I have done)

http://forums.offshoreelectrics.com/...light=questtek

[kookie_guy]

I've never seen a controller for twom motors...to make them run together, you need a Y harness to connect the two contollers to the reciever.

lol, posted at the same time, but I BEAT YOU!!!!!

As I recall, you have to disable the BEC on one of the controllers? Can anyone verify that? Otherwise, too many volts going to the receiver?

I was thinking that too, but it dawned on me that you are putting them in parallel. So do you really have to disable the BEC on one of them? You'll still be getting the 6v (assuming that's your BEC voltage), but only double the current. Not sure if there would be any kind of damage if there was an inbalance. Say one BEC put out 5.8v while the other 6v, or if there would be any damage from some kind of voltage backfeed or something. Experts?????

[Boaterguy]

well, people wire batteries in parallel all the time. obviously two batteries will never put out EXACTLY the same amount of current, EXACTLY the same voltage, and hbe rated at the same capacity, the ESC's can still handle it an'd i'm assuming the radio will too. maybe some sort of cap setup across the bec to help level it out just in case.
the thing about running the motors is that they are in parallel, you will need very high discharge and capacity batteries to run this, probably a 2P setup, with all that money spent, another ESC in there won't cost alot
I am not downplaying the idea, it is very intuitive, just make sure you keep an eye on your temps.
now, the fun part. if you have two motors, an esc and battery you don't want, try wiring the motors in series. I don't know exactly how you would wire it because I don't have two motors and an ESC in front of me, but would the feedback (forget what it's called, EMF or something) not level out, one motor would level out the power of the other. I know this isn't supposed to work, because ESC's are not built that way.
I have seen a dual ESC somewhere, I think it was 300A total (150ea) for something like 600$, it stated it was just two ESC's on one pcb, completely seperate other than programming, but you can get ttwo 150A esc's for much less than 300$ ea.

[SpeedFreak_86]

Hey thanx for all the help! Im thinking of trying the Traxxas EVX-2 and Traxxas 12 turn titan motors... It's a 40 inch boat.... How's that combo sound?

[kookie_guy]

Hey thanx for all the help! Im thinking of trying the Traxxas EVX-2 and Traxxas 12 turn titan motors... It's a 40 inch boat.... How's that combo sound?

That boat is way too big for that motor. Plus it's a brushed system, not nearly as powerful and efficient as a brushless system.

[dana]

im confused, the thread says dual brushless... and now youre talking about evx2? what did i miss here? you realize you cant power brushless motors with that thing right?

[kookie_guy]

im confused, the thread says dual brushless... and now youre talking about evx2? what did i miss here? you realize you cant power brushless motors with that thing right?

He clearly states "Traxxas EVX-2 and Traxxas 12 turn titan motors"

maybe just not going to pursue a brushless system right now.

[SpeedFreak_86]

Yea the cost of a pair of nice brushless motors and esc's is a Lil outta my budget.... Research says it's more than I got lol... I was more or less just wanting to learn a little on running a dual brushless system...

[Boaterguy]

make sure you get a very large ESC, to cope with the amp draw from each motor. you might need some bigger motors if you are going brushed.

[LarrysDrifter]

Here's how it goes:
2 motors
2 esc's
2 batteries, one for each motor and esc. Or, parallel the esc's and use 2 batteries wired in series. It's a lot easier for a beginner to just use one battery per motor/esc. Twin systems are more costly compared to single systems. Consider that when thinking about your budget.

[Make-a-Wake]

Speed, the twin titan/EVX setup may well be a recipe for disaster in a 40" boat. The 550 sized motors arent very powerful......maybe 175 watts each or so, and they are too high of a KV for a boat as well. There are inexpensive brushless systems out there as prices have dropped considerably in the past year or so. Consider a couple of these motors and ESC's for a twin 4s lipo setup. These motors are actually CHEAPER than the brushed 12t titan...............and the ESC's TOGETHER cost what one EVX does!

http://www.hobbyking.com/hobbyking/s...idProduct=6526

http://www.hobbyking.com/hobbyking/s...idProduct=8946