Your desired speed/torque/Kv also might be a factor in choosing the number of teeth/poles. All other things being equal (which they won't be...), the 18t motor will have 2/3 the speed of the 12t motor, but 1.5x the torque (not accounting for different winding volumes, etc). You could still make the Kv of either motor almost anything you wanted, but this is probably a good time to decide about what range you're shooting for.
Miles wrote:I was planning to use a layer of Kapton tape.
That's what I would have suggested, even using really thin heatshrink you'll end up with 2x the thickness between wraps. Kapton tape should be pretty easy, since you could just apply it to one side of your copper strip and then roll the whole thing up.
Lebowski wrote:I found it very interesting that apparently there are more than one way of generating electro magnetic force
and that different motors use different principles.
That's not accurate. There's more than one way to analyze and calculate
the force, but Maxwell's laws haven't changed. If you've figured out how to do that, let me know and we can get stinking rich together! Calculating the torque using an iron core is trickier because it really requires software to calculate the flux, whereas it's constant in an ironless machine. Once you know the flux, it's a fairly simple matter to calculate the Kv (V = N*dPsi/dt) and from there the Kt.