>And in terms of energy cost, large classical airships like the ones that flew in the 1930s are just barely cheaper than the most efficient cargo planes... Thi

>And in terms of energy cost, large classical airships like the ones that flew in the 1930s are just barely cheaper than the most efficient cargo planes... This, I think, is simply wrong, though I'd be happy to look at numbers to the contrary. Unless, of course, he's trying to compare actual airships from the '30s to today's cargo planes.