Axial flux alternator is an easy to make pancake of stationary coils between spinning permanent magnets. Having made one and played with it, i ended up with a few questions. Would it make a good motor? There are axial flux motors for sale, and my alternator spins nicely when hooked up to a BLDC driver. How does it compare with other brushless motor designs, and what should be altered (if anything) to make it a more efficient motor? Are air core coils good, or should there be iron in them? I was looking at BLDC motor designs, and the coils are always winded on iron "horns" of the stator. However, all designs for axial flux motors or alternators i found on the internet use just air core coils. Would it help to put a piece of iron inside them?