I wonder. How to you best combine electric motors. Everything needs to be optimized for life and life can operate at small dimensions. This means efficiency needs to be good at small dimensions. So from this I guess there should exist multi electric motor engines.
What if you have 4+ small electric motors for the same output as a large one. I saw that the sewing machine went from a 90W motor to a low voltage 10W small motor. This for those solar powered machines.
What would it look like? Is a 4 cylinder engine inspirational since its a proven structure?
So I think it could be an idea to create a powerful low voltage electric motor system.