Today’s invention is a multi-tube fuselage design for airliners.
This would be subject to the same drag force as a conventional wide-bodied jet. Although the bundlebody perimeters would be twice as long in total as that for the conventional machine, the wall thickness in each case could be made half as thick, due to the enormous increase in pressure resistance which comes with narrow cylinders.
Each narrow cylinder would have local space in which to store one’s baggage (ensuring that any terrorist explosions are isolated in effect and that the crew, flying in another cylinder, are better protected).
The narrow tubes would be easier to support in the event of a depressurisation incident.
Aircraft could be much more easily configured, on the ground, by detaching some tubes, to cope with sudden changes in passenger bookings. In addition, the views for all passengers would be improved.