Probably electric i think.
Battery packs are the two bars each with 4 electric motors. If something like this ever reaches production the battery pack will be more stylish.
Yes, electric helicopter.
When you look at it, it basically is a helicopter, but to make a helicopter electric you probably never will be able to put in an electrical motor for that big propellor. So in this case you need an amount of smaller electric motors with a smaller propell...
