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I would not bet on there being no improvements in the efficiency of air travel. Changing to turboprops would be a big improvement. And today's cylindrical fuselages are optimized for production cost, not fuel efficiency. Here's how they should be shaped...

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19860014381_1986014381.pdf

by asdf on Fri Jul 22nd, 2011 at 11:53:25 PM EST
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