Outrunners supported/held by the shaft?

[redshift]

I've been looking at this one guys, 400 kv, 8mm shaft http://hobbyking.com/hobbycity/store..._(Eq:_4030_AXi)

What are your thoughts on that on sikes?

Zp I wonder if 1mm wall is enough? Then again going to a motor with a 10mm shaft will bump up the weight and size significantly. Just thinking about 2mm would be better for a hollow shaft.

[sikeston34m]

Originally Posted by redshift

I've been looking at this one guys, 400 kv, 8mm shaft http://hobbyking.com/hobbycity/store..._(Eq:_4030_AXi)

What are your thoughts on that on sikes?

Zp I wonder if 1mm wall is enough? Then again going to a motor with a 10mm shaft will bump up the weight and size significantly. Just thinking about 2mm would be better for a hollow shaft.

That's not a bad looking motor. A Much cheaper alternative. When you go cheaper, you make compromises though.

Hmmm.......the hollow shaft idea?

Take a look at the counter rotating double motor setups:

http://www.maxxprod.com/mpi/mpi-266.html

I'm sure we could get a hollow hardened shaft for one of these applications. Tried, tested and true, I'm sure.

[zeropointbug]

No, 1mm prob isn't enough, but 1.5mm should do it, after all this is high carbon steel we are talking about here.

A 4.8mm shaft should do it to give a little tolerance play in the hollow shaft, me thinks?

If I stick with an outrunner, I will probably go with the Scorpion motors, I don't like to go cheap, I have learn my lesson after a Feigao motor...

Sike, what does the contra motor have to do with this? j/k Good idea for the plane guys though!


I just emailed Neu Motors about making a special motor, so we shall see if they can make something, and if it's even feasible. I should just get Neu to custom make a special motor/gear box into one unit (replaceable gears obviously) and sell it under my own company.

[sikeston34m]

[QUOTE=zeropointbug;325808]

Sike, what does the contra motor have to do with this? j/k Good idea for the plane guys though!

[QUOTE]

The Contra Motors have alot to do with this.

In the area of diff cup flex!

Use a hollow hardened shaft from one of the Contra Motors, cut it off flush with end of the rotating endbell, then bolt on your diff cup.

This would support the endbell properly, eliminating flexing pressures from the cup. It would be hollow to allow your center drive shaft to go right back up through to the other end of the motor.

Make Sense?