Yes it will work but I really can't see why anyone would want to do this no more than I can see any logic in the single magnet disc axial with no return flux. There is some case for doing it as an axial to use standard cheap magnets rather than odd smaller ones for dual rotor.
The axial version is far easier to build and you can adjust the cut in speed by simply altering the clearance between magnet rotor and stator. Once built you are stuck with the radial if your cut in is wrong. The thing is a pain to mount physically with windings around the outside and you must have no solid metal in the region of flux linkage.
It makes more sense to build the equivalent of a dual rotor this way with magnets inside and outside or with magnets in a drum on the outside and a spinning steel cylinder inside.
Before the days of neo it was virtually useless to build things like this so I can't see the logic of using neos in very poor designs where it costs more to get the same output. Everyone to his own choice as always.
Flux
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