Originally Posted by
CLazarus
Everything I've seen in Aviation Week and elsewhere says twin-aisle. The fuselage weight penalty for an extra aisle is not that much, and considering that the fuselage is widely reported to be elliptical I'd say the penalty is almost nil
Are you kidding? The weight and added drag of a larger fuselage for a second aisle is why you don't see any passenger 767-200 aircraft around anymore. It had the highest CASM for that reason alone.