This suggests engines are 50% more efficient today than in 1960, with 80% reductions in fuel per passenger seat. [1] If advanced physical simulations could pro

This suggests engines are 50% more efficient today than in 1960, with 80% reductions in fuel per passenger seat. [1] If advanced physical simulations could produce a wing 20% more efficient than the concorde, with engines 20% more efficient, and the weight of control, actuation systems, and cabin interiors were all reduced by 20% the gains in operating cost and range would be substantially more than 20%. Gains in aircraft are typically non-linear because they all affect each other. It's exciting to think about what might be possible with 50 years of materials science, _computers_, simulation, electronics, and propulsion technology. [1] http://www.atag.org/component/downloads/downloads/59.html http://www.atag.org/component/downloads/downloads/59.html [pdf]