Originally Posted by
Bend alot
Certainly for an aircraft designed in the 21st century, exactly the same pioneering level as a moon landings in the 21st century.
The mechanics and materials even design is not new.
That's true, But what is new, is that same old design (" The first 777 passed the test no problem (many years ago").
is now being pressurised to a HIGHER LEVEL to satisfy marketing policy that the cabin alt will be lower, similar to
the 787.
Somebody here will tell us the pressure differential increase I'm sure.