A large part of the propulsion of a modern turbofan jet plane is provided by so-called "bypass" air, air that flows around the core of the engine. If you can sp

A large part of the propulsion of a modern turbofan jet plane is provided by so-called "bypass" air, air that flows around the core of the engine. If you can spin those turbine blades electrically you can get nearly as much thrust as the jet version. The challenge is in finding out how to do this. You could do this with some other mechanism if you can come up with a way of storing lots of energy in a liquid or solid that isn't too heavy. Some discussion here: https://aviation.stackexchange.com/questions/26910/could-an-electric-engine-provide-the-same-performance-as-jet-engines-on-current https://aviation.stackexchange.com/questions/26910/could-an-...