Upcoming Castle Outrunner Motors

[sikeston34m]

Ok, here's a showcase for you guys. Maybe you will see why I'm excited about Castle's new outrunner line.

First up is where it all began for me and outrunners. The E maxx with an outrunner directly connected to the transmission input shaft. Actually the motor shaft and the input shaft are the same.



Next up, is the Revo Direct Drive to Diff Build. Powered by a custom wound AXI 4130. It kept blowing the bearings on the RCM diffs in about 2 runs. The Ceramic Nitride bearings faired no better. Differential toughness is gonna have to catch up before this setup really works well. Show me an inrunner that explodes diffs like this.

http://www.youtube.com/watch?v=dFDrYXLkcGg

Next up is the AXI 2826/8 setup.

[sikeston34m]

Let's talk about why outrunners have more torque.

A Medusa 36-60's armature is 15mm in diameter and is 35mm long. It has 4 VERY strong magnets, thus making it a 4 pole motor.

An AXI 2826's stator size is 28mm in diameter and is 26mm long. The ID of the magnets inside the rotating endbell is 29mm.

The larger diameter is "easier" to turn because of leverage. This is why there's a knob on the door instead of just a shaft sticking out. LOL

Take a look at my avatar. For each phase shift, there are 4 teeth of the stator energized at any given time.

This means, at any given time, there are 4 magnets in use at any given time. More Magnets, greater force.