Airship.org was set up in 1987 to promote vertical airships as the future of air transport. Tall airships, they claim, are easier to construct, more efficient load carriers and more nimble in the urban environment than their cigar shaped forebears. The description of them having “interesting aerodynamic characteristics” could be read in a number of ways though.

The Airship.org site has specs for several proposed designs and you can download a model of one of their ships to fly in Microsoft Flight Simulator.