Can I run 2 motors on one ESC?

[Sammo]

Morning,

I've had an idea for another speed run project which involves twin motors. The build I can handle but I'm not sure on the electrics. Am I going to need two ESC's? If that's the case then how do I wire them both to one receiver and do I then have to run two batteries? If I can use one ESC then which one do I need to buy?

Thanks for any help in advance 👍🏼

[Nobbi1977]

Quite a few cars run twin motors.

 

The WP860 is a good cheap unit from hobbywing

[Kingfisher]

4 hours ago, Sammo said:

Morning,

I've had an idea for another speed run project which involves twin motors.

This seems a bit strange as I was just looking up the same thing, for the very same reasons. By any chance are you looking to run twin motors on a TT02? 

I found the WP860, but it's for brushed motors. 

 

Also: @Nitomor has two brushless motors and two ESC's running here:

https://www.tamiyaclub.com/forum/index.php?/topic/78102-wt01-4x4x4-project/&page=2&tab=comments#comment-613171

 

[nde63h]

4 hours ago, Sammo said:

Morning,

I've had an idea for another speed run project which involves twin motors. The build I can handle but I'm not sure on the electrics. Am I going to need two ESC's? If that's the case then how do I wire them both to one receiver and do I then have to run two batteries? If I can use one ESC then which one do I need to buy?

Thanks for any help in advance 👍🏼

tamiya TEU-106B
https://www.tamiyausa.com/items/radio-control-parts-70/radio-control-electronics-28000/rc-esc-teu-106bk-brushed-45054

 

rc4wd Outcry II
https://store.rc4wd.com/Outcry-II-Dual-Motor-Waterproof-ESC_p_5331.html

 

traxxas EVX-2
https://traxxas.com/products/parts/escs/3019Revx2lvd

[Kingfisher]

Looking at the RC4WD Outcry, it looks like the motor wires are split with a Y-connection. If you had a high enough amp ESC, could you do the same Y-connection with it?

 

Quote

Output Current: 320A Forward, 160A Reverse

 

[nde63h]

9 minutes ago, Kingfisher said:

This seems a bit strange as I was just looking up the same thing, for the very same reasons. By any chance are you looking to run twin motors on a TT02? 

I found the WP860, but it's for brushed motors. 

it seems impossible for brushless motors as they have to communicate with the esc.

[lentner3]

Twin motor TT-02 sounds intriguing, I’d like to see how that’s could work?

[Kingfisher]

19 hours ago, lentner3 said:

Twin motor TT-02 sounds intriguing, I’d like to see how that’s could work?

Quick cell phone pics of the idea:

 

 

 

The motor on the right is the normal location. The left is the battery tray. Using that space, I would cut out the area blocking the pinion from meshing with the spur. I'd smooth it down flat and drill two holes for the motor mount. I'd use the metal Yeah Racing motor mount, add support and go from there. Then, both pinions drive the same spur. 

[lentner3]

1 hour ago, Kingfisher said:

Quick cell phone pics of the idea:

 

 

 

The motor on the right is the normal location. The left is the battery tray. Using that space, I would cut out the area blocking the pinion from meshing with the spur. I'd smooth it down flat and drill two holes for the motor mount. I'd use the metal Yeah Racing motor mount, add support and go from there. Then, both pinions drive the same spur. 

What would be the advantage over a much more powerful motor and perhaps 3s ? I can understand it when running two gearboxes separately like a twin dagger. But surely there are easier ways to increase torque and rpm. Having said that there needn’t be any logic I’ve tried far more illogical things before just for the fun of it. This certainly seems like something I would try. Be sure to take more pics as you progress. I imagine mounting the motor will be the trickiest bit.

[Kingfisher]

1 hour ago, lentner3 said:

What would be the advantage over a much more powerful motor and perhaps 3s ? I can understand it when running two gearboxes separately like a twin dagger. But surely there are easier ways to increase torque and rpm. Having said that there needn’t be any logic I’ve tried far more illogical things before just for the fun of it. This certainly seems like something I would try. Be sure to take more pics as you progress. I imagine mounting the motor will be the trickiest bit.

I wouldn't be using a pair of silver cans on Nimh. A pair of 4370kV brushless on 3S should be able to push a bigger gearing setup more than one 4370kv and 3S. Where one motor would struggle with gears, two motors should do it at ease. But, mostly for the fun of it. To see how fast it could pick up the speed, what the speed would be compared to one 4370kv on 3S (my Celica TT02), and the fun of having something overpowered. 

I got the idea from building my MudBlaster/Amarok into a dual gearbox setup.

https://www.tamiyaclub.com/forum/index.php?/topic/85220-i-bought-my-first-roller-4x4x4-build-thread/

 

[lentner3]

“The fun of having something over powered” haha love it.

unfortunately you have now inspired me. 

[MadInventor]

I hate to dampen the fire of your enthusiasm lads, but I destroyed 2 spur gears in my DF-02 with a single 4000KV motor running 3S, so unless you can fit a steel spur gear very securely to the rear centre propshaft I think all that will happen is that you'll twist the spur gear off the centre shaft with the torque of twin brushless. If you want  to go big power, I think it would be more cost effective to put a 1/8 brushless (like a 4274) in it at use 4 or 6S instead. The 4274 uses the same bolt pattern as a 540, so all you need to do is free up some extra space around the motor mount and get a pinion with a 5mm diameter centre hole.

This might  be a better idea,  with a 4274, and it would leave more space for a couple of large capacity saddle pack batteries (Note the alloy mount for the spur gear)

[LongRat]

You need to directly couple one motor to the input shaft of the rear gearbox, and the other directly to that for the front.  Each motor on the centreline, back to back against each other.  With that much power there will not be a need for any gearing with the right motors.

[steelo]

I believe you can run a dual motor set up on 1 ESC if you use motors that are double the turn rating. For example, if the ESC is rated for 13 turns or more, you can run 2 26T motors with it. I'd definitely make sure it has proper ventilation though.