Weird and wacky plane designs of the future

Flying doughnut, anyone?

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Could any of these weird and wonderful patents and designs become the future of air travel?

See also: Are these the most bizarre travel accessories ever?

See also: Weird and awesome in-flight gadgets you'l wish you had invented

Take the 'flying dougnut' for example. This radical design from Airbus UFO-like aircraft would seat passengers in a circular cabin with a hole in the middle.

Other ideas include adjustable plane seats on wheels, bycicle-style seating to save space, and even detachable cabins....

Wackiest aircraft design ideas

Wackiest aircraft design ideas