Aviation has set to work on a raft of problems it has been solving very slowly over the decades. Aircraft are still too heavy, use too much fuel, are fairly cramped and - most important of all - generate a lot of carbon. As incremental improvement wane, designers have turned to much more radical solutions and emerging technologies in the hunt for bigger changes. Here we chart the key changes that are just around the corner thanks to visuals created by Imperial College and Airport Parking and Hotels (APH). Although some of the ideas are not new they might at last be possible.