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-   -   dual brushless motors (https://www.rc-monster.com/forum/showthread.php?t=10167)

drkros3 02.13.2008 03:44 AM

dual brushless motors
 
just had a question. if i use 2 brushless motors do i need 2 esc's or can the motors be wired together to go to one esc.

thanks

Arct1k 02.13.2008 07:09 AM

two esc's...

nl12 02.13.2008 11:20 AM

Unless...

steveo 02.13.2008 11:27 AM

depends on how big the motors are and what esc you are using , you could use up to 700 size motors on a evx esc.

sleebus.jones 02.13.2008 11:32 AM

Why not just size the system properly for one motor and be done?

jhautz 02.13.2008 11:58 AM

you could use one, but the motors would need to be identical and timed to each other. Not that easy to do, but its been done.

I agree. one properly sized motor is more efficient and just as powerfull.

suicideneil 02.13.2008 12:32 PM

But two gets you 'cool' style points...

:P :D

drkros3 02.13.2008 01:03 PM

reason for 2 motors is cause im going to start building a truck and im going to enter the worlds fastest rc car challenge.

ok and thanks you guys answered my question.

suicideneil 02.13.2008 01:11 PM

Well, that does change things though, since you are building a truck for a speed record. To find a single motor as powerful as a couple feigao XLs, you'd want something like a massive Neu or lehner costing 10 times as much, and esc costing.... I wouldnt like to guess. JohnnyMaxxima has a Gorillamaxx based truck with twin 7XLs running on 5s each- and Bk9920s I think it was-that should be a good point of reference for you.

Arct1k 02.13.2008 01:33 PM

steveo - evx is not a brushless controller it is a brushed controller...

Jef - I guess you could ensure that the rotor was at exactly the same point... I suspect it would be difficult to achieve with variation between motors etc

MetalMan 02.13.2008 01:44 PM

Dual BL will not have that much of a gain over single BL, considering the extra weight involved. With dual BL, you pretty much need twice the batteries as a single motor.

My Savage will be entering the competition, with a single KB45 10XL (1200 kv) running on 10s2p A123, with a CC Phoenix-HV110. It's geared 20/46 with a center diff (no tranny), for a theoretical top speed of about 65mph. I haven't reached top speed yet because the suspension is too soft and the oil in the center diff isn't thick enough.

drkros3 02.13.2008 08:12 PM

ok now would a xl motor push our more power then a L motor?

MetalMan 02.13.2008 09:29 PM

For continuous usage, yes. At the same power level, a shorter motor will generate more heat.

drkros3 02.13.2008 10:12 PM

so if im only using it for a little bit of time could i use a L motor.

zeropointbug 02.14.2008 02:30 AM

i would stick to one larger motor

what are you running this in?

a large Neu motor should work wonders for speed records


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