Originally Posted by
procede
With a narrowbody, the fuselage would be so long, it would mean a heavy structure to counteract the bending and also very high and/or complex main gear to not have a tail strike on takeoff and landing and still get to an appropriate angle of attack. Going to 2-3-2, like the 767, you are adding a aisle for a single extra chair per row. Aisles do no generate revenue, but do add volume (drag) and weight, making the aircraft increasing the cost per seat.
Originally Posted by
oceancrosser
The 757-300 and the DC8-61/63 called, they beg to differ on the single aisle length. Pretty similar length both of them.
I assume a new Boeing NB would be a bit wider / higher than a 757-300 or DC8. A bigger cross section to improve structural efficiency/ weight and facilitate standard NB containers/ pallets.
Because Boeing now knows these disadvantages of the 757/737 fuselage. They can avoid / reduce them, if they know it will be a 35+ rows aircraft for longer flights.
The biggest variant of the Russian (if ever build) MS21-400 is going to be a 757 class aircraft, nearly 2m longer than an A321.
