If it doesn't affect the return path of the fields, it shouldnt' change the motor operation.hias9 said:Can back iron on a DD outrunner be reduced to save weight without a negative effect on efficiency as long as there is still no magnetic field measurable on the outside of the ring?
hias9 said:Why do you think the manufacturers went away from using backiron inside an aluminium shell?
Did it have some kind of form-closure or was it just an iron ring pressed into an aluminium shell?
hias9 said:After removing the excessive back iron on a lathe, the available solutions for cooling fins like Hubsinks would not fit any more.
What would be a good way to machine custom cooling fins? I guess EDM cutting them would be extremely expensive.
Add a binding wire circumferentially around the central groove to tension them all against the rotor. (this will also hold them in place while the epoxy cures; just don't remove it when done)hias9 said:but I am a bit afraid that they could become loose at very high rpms or if a stone hits one segment while riding offroad.