Comment Re:Ideas are a dime a dozen. (Score 1) 346
Which physical limitations are we speaking of?
As far as I know planes fly just fine, and batteries are only lacking in density (there are purely electric planes today, but the range is poor). If anyone can pull the maybe 3x improvement necessary to make this into a reality for short flights he can.
It is certainly not that far out there that I would call it a limitation derived from basic physics.