Date: 30 Mar 99 01:53:41 From: "David Fielding" <email@example.com> Organization: Home References: 1
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Well, just a few thoughts: Submarine hulls are built very strong to withstand pressure; they use the strong structure to store fuel, too. Airplanes have their strongest structures in the wings, which is where they keep their fuel. The fuselage of an airplane is made as light as possible, to carry the design loads and last for the expected number of takeoffs/landings. They are tough, but the loads are not concentrated like the spars of a wing. Any excess weight in the fuselage structure would only subtract from the useful load of the plane. And I imagine that a double-walled fuselage, capable of holding thousands of pounds of fuel, would weigh far more than the current cigar tubes. Anyway, the airliners currently being produced don't seem to lack for fuel capacity; many spend over 10 hours in flight, on VERY long routes. How much farther do we need to go? David Fielding -- firstname.lastname@example.org Good judgement comes from experience. Experience comes from bad judgment.