Fair enough. They said that a double rotor version has been developed, but all their prototypes and marketing material are single rotor. We can probably assum

Fair enough. They said that a double rotor version has been developed, but all their prototypes and marketing material are single rotor. We can probably assume that single rotor is all that would fit on an in-wheel design but there are other ways to skin the cat. They would still need to include a light thrust bearing on the double rotor design since you can never assume perfectly balanced air gap and one side or the other will dominate, but the losses would be much lower with that setup.