that implies an entire infrastructure to bring that fuel into the airport as well. they'll also do away with windows for passengers. the wing blending into the cabin means you just can't have them. instead, there's a suggestion that passengers will have virtual screens, which should make up for the lack of a real view. well, that's where hybrid technologies come in — aircraft which look like a conventional airliner gas engines on the wings but with an additional electric fan behind the tail. this is a concept known as boundary layer ingestion. now, boundary layer ingestion is a technology which is aimed at taking the flow that forms over the surface of an aircraft, the flow that's on the surface is what usually