although it can be used to fuel aircraft engines, it has a major problem, in that it takes up around 3 times as much space to store enough to go, say 100 miles, as it would to store enough petrolium based fuel to go the same distance.
Getting back to aircraft, I've got this picture forming of a fleet of Zeppelins inflated by hydrogen, which is also the engine fuel so they, erm.. shrink as they proceed down route.
