Had an EPIPHANY during math class today

[MetalMan]

So there I was, sitting in a two hour lecture on infinite sequences/series by a British professor (funny guy!), and all of a sudden this hit me (attached):

[_paralyzed_]

I don't get it, nice shading though

[brushlessboy16]

i see a slipper on the outrunner

[Takedown]

I also see a slipper setup on the outrunner but whats with the two shafts, diff and a solid gear?

[MetalMan]

Originally Posted by Takedown

I also see a slipper setup on the outrunner but whats with the two shafts, diff and a solid gear?

Correct! It's actually two separate ideas, but I didn't want to draw two motors.
The top is in fact a slipperential with the slipper on the outrunner shaft and that drives a center diff.
The bottom is just a solid shaft.

I will have to explain myself later, for now I gotta get ready for work.

[brushlessboy16]

oh okay. why not just run direct drive :D

[lincpimp]

Originally Posted by brushlessboy16

oh okay. why not just run direct drive :D

With a geared setup you can maintain the center diff, use a slipper, and also use an outrunner that may not have the optimum kv for your intended battery and desired top speed. A smaller higher kv motor could be used with a smaller "pinion" on the slipper than the center diff "spur" (like a 36t revo spur on the slipper driving a 46t spur on the center diff)

[Takedown]

Maybe he wants the nitro spool up feel.

[Semi Pro]

so the out runner fits in the transmission, like on a revo

[MetalMan]

Originally Posted by MTBikerTim

So is your idea putting the slipper on the pinion instead of onto the diff? Something like the LST slipper would be good for that as it seems to be able to handle power.

The slipper goes straight onto the motor shaft. Think of Mike's original Slipperential, but this will work with outrunners and decrease complexity. In my experience the Revo slipper clutch is actually quite good and highly adaptable, and I have no experience with the LST slipper.

Originally Posted by TruckBasher

Interesting...well one good thing about outrunners is they promote innovation and not just traditional stuff...

I am yet to find out if it is innovation or just heartache of wasting time/effort

We will see if this effort is worth the time...

Originally Posted by BrianG

So basically, more gearing options. That was one of the things I didn't like about outrunners; you had to make sure to get it right because there are so few ways to adjust gearing

More gearing options is one of the main ideas I had in mind. Here's the deal - I want to use my 610 kv 4120/06 outrunner from my MT2 in my Corr truck, but on 3s Lipo I would need a kv of ~900 for direct-drive-to-diff to get the desired speed. But with this outrunner setup I can OVERdrive the "spur" gear and effectively acquire a higher RPM to the diffs.

Originally Posted by Semi Pro

so the out runner fits in the transmission, like on a revo

There's no transmission here, or at least not in the traditional sense. Each part is standalone.

I TOTALLY fell asleep in Math yesterday for a few minutes.

[BrianG]

So basically, more gearing options. That was one of the things I didn't like about outrunners; you had to make sure to get it right because there are so few ways to adjust gearing

[TruckBasher]

Interesting...well one good thing about outrunners is they promote innovation and not just traditional stuff...

I am yet to find out if it is innovation or just heartache of wasting time/effort

[BrianG]

IIRC, Patrick (pdelcast) made the apt comparison:

Two pole motors are like import 4-cylinders. They have high rpm/horsepower, but less torque. Neus are like domestic V8's, lots of hp and torque. And outrunners are like diesels with lots of torque but don't like the higher rpms.

I'm too lazy to go find the post, but it's along those lines.

[Takedown]

Originally Posted by BrianG

IIRC, Patrick (pdelcast) made the apt comparison:

Two pole motors are like import 4-cylinders. They have high rpm/horsepower, but less torque. Neus are like domestic V8's, lots of hp and torque. And outrunners are like diesels with lots of torque but don't like the higher rpms.

I'm too lazy to go find the post, but it's along those lines.

Very well said Brian!