Found something intresting on Ebay
 

Here is an intresting tranny motor setup I found on EBay http://cgi.ebay.com/New-E-maxx-Brush...QQcmdZViewItem it looks to be set up nice, not sure about the lack of slipper. There is a few video's on the link. I would like some opinions, because i think it would be a cool racing combo on 4s lipo in the G2R

Looks like an outrunner running directly into the tranny. You won't have much gearing choices (NONE), and you don't really know how it will perform, either torque, or top speed.

I have always wanted to use outrunners, however, i think they should be used without a tranny, and if it's possible without diffs (1 motor per wheel) for true transmission-less operation.

If these outrunner's were efficient enough, like 92%, that would make a very efficient setup.

Eventually we will have motors right inside the wheels.

To cut to the chase, I wouldn't bother with it... IMO

Looks good to me. Appears to have plenty of power and speed. Being able to use a quark 80 is nice, a bit cheaper, but you're still looking at $400 + batteries to make it all work.

Sleeb

http://www.rc-monster.com/forum/showthread.php?t=5991

I saw this a couple weeks ago. Was wondering how it would perform myself. Looks interesting at the least. The biggest issue I see is if you need to vary gearing for any reason, the only options you have is to change the motor for a different kv or go with different size tires.

It appears to run decent in the video, but somehow it just looks a litlle hokey to me. If you decide to give it a try let us know how it works for you. I'd for sure be interested to hear about it.

Outrunners and cars don't go hand in hand.

It's easier to use a smaller rotor to spin up/down/up/down/up/down/up/down than a larger outrunner.

That plus the weight of the rotor and the missing slipper.. It's asking for trouble. hard on your controller/drivetrain.

I agree with Serum. The pain on the drive train would defiantely catch up with everything, and for 200.00? I would think you would be happier with a MM and xl motor to say the least.

Interesting but not a good idea if you ask me.the slipper isn't just needed to protect the spur and pinion like he seems to suggest.

Thanks for thr input, from what i could see you could adjust with batteries (speedwise), but that could be expensive

I can't see any kind car/truck working without a slipper or some kind of clutch. There's just no way. On an airplane...yeah. On a vehicle with 4 wheels...not a chance in hell. Even if this trany/motor combo holds up like the seller claims, the drive shafts and differential gears wont stand a chance. My guess is this seller drives his truck in a parking lot. Give that trany to me and I'd have it gutted within minutes in my off road bashing pit. One good jump and that sucker would be toast.

It would work if you got rid of ALL transmission components, and had a motor per wheel, running direct drive. You would need smaller, higher torque ones. Something like 20 poler, ran by smaller esc's, but i would think there would need to SOME communication between each controller to make it track straight...

IMO

Yeah. Something like a Pentium 4 to take care of the traction control. It's a pipe dream. At least it is for an RC. A real car that has all 4 wheels planted on the ground at all times and isn't quite so off road performance based would be more doable.

I just meant for keeping the same motor frequency, they just have to be synced is al. But, simply doing the throttle travel programming together is prob good enough anyways, i would think?

I thought about this; with active suspension, and every wheel powered independent, with the right software it would be a dream to handle.

Well $H!T yah! It would be like limited slip diffs, only more natural feel i would think. It would also be near silent operation... that's neither a good or bad thing.

Do you think it would need some kind of controller that could keep teh front and rear same speeds, not synced, but like a center diff, just very stiff.

Some day, some day!

I think the idea as a whole is good. But having independent motors on each wheel would get spendy the maintain. When I drove electric fork lifts, they were powered similar to your idea. The motors however took a beating, that is for sure. Although they carried more weight of course. But RC's would require smaller motors to power each wheel, this would add some weight as well as a suspension that could also work and handle it as well, and would also add some weight. I would think the motors would eventually wear at different times and end up getting costly and a PITA to repair. yes it would handle like a dream, but at what cost?

The R&D would be simply insane to build a computer that could take care of 4 wheel traction control like this. The truck would practically have to have censors in it telling the truck which way it's going and at what speed. It's the kind of technology Mercedes Benz and Volvo spend mega millions of $ on to engineer. Yes it would handle like a dream. But it's ALOT harder to do then it sounds. I have no doubt it will happen years down the road. But don't hold your breath. It's a long ways off.