Meet the aircraft powered only by the Sun, wind, thermals – or the pilot’s muscles! There’s the Gossamer Albatross or Daedalus 88 – great for cyclists – plus gliders, hang gliders, a mighty solar-powered plane, and gigantic airships of the future. These ‘green’ machines are also the stars of amazing records: highest flight (in a balloon), longest pedal-powered flight, highest freefall and much more...