We've been ballooning for nearly 200 years and the latest lot have been at it for nearly 50 years (same people with different company names). How much of a chance do they get? See below.
Oh, and the Yanks aren't stupid and they would have thrown money at it to make it work if it was viable, both financially or technically. They saw the writing on the wall and were licky to recover £301,000 of their millions by selling it back to the snake oil salesmen.