An idea I've been fond of for some time now has been to implement multiple BL motors into a RC vehicle in order to gain increased control over the rotation of the tires. One thought I've had is an on-road car which uses one motor per tire, and by controlling each motor individually through a radio (like using "Tank Mode" on my Nomadio React) I could basically make 3 electronic diffs. One "diff" up front, one in the center, and one in the rear. The front and rear ones would help with turning and traction control (with the help of a gyro or gyros), and the center "diff" would control front/rear acceleration rates as well as brake bias (like a center diff + mech. brakes).
But since I don't have the time or funds to develop an on-road car with 4 motors, 4 ESCs, and a specially designed chassis, I'm thinking of trying this electronic "diff" idea on my (currently) nitro Revo 3.3.
With two outrunners of appropriate size and kv in the middle, each with a driveshaft attached to it, and two CAR ESCs, I am quite confident I can accomplish this.
Here's my plan:
-two Sidewinder ESCs with power inputs hooked in parallel (so they draw from the same source), hopefully they can take 5s A123
-two 4110 to 4120 outrunners of about 500 kv
-5s2p A123 (I've already got two of these packs)
-Nomadio React (already have this, and it is capable of quite advanced channel setup, even better than channel mixing)
The front MM would have a lower brake strength, as well as less punch control than the rear MM. This will allow the front to pull better under acceleration, but also give the rear stronger braking to help the rear slide out a bit.
Because of the advanced channel configuration of the React, I would be able to alter things like exponential and endpoints of the front and rear independently from each other, on the fly, to fine-tune the driving without touching the ESC settings.
The key here really is the radio: As I've said countless times before, I really love the Nomadio React
.
Opinions, criticism, anything will do. I've got to save up some cash before I can attempt this, so things can change.