2007-04-20 [fen]: on discovery was shown a movie where they sayd that, to make such a large thing fly it would need aerobial sacks (like birds) full of H2-hidrogen (unlike birds) produced by gut-bacteria. chewing platin would give them a catalist: mean they would speet H2 and in contact with pieces of platin it would burst in flames!
Problem is: the more fire it spit, the less it would fly
just giving an idea