To explain this drawing, (I labled the files plane1.jpg and plane2.jpg on my desktop)

 

plane1.jpg = "barebone" / inside layout.

blue cylinder = passenger area/passenger compartment that can be inserted into:

brown cylinder attached to the blue = shell, that is to be attached to the blue cylinder.

so in emergency situation, blue detaches and slides out of the brown cylinder.

grey cylinders = jet engines, again attached to the brown shell.

black cylinders = batteries, it can extend and be expanded in diameter at the back

if need be.

if you will notice, the space between jet engine cylinders,

and the expanded diameter of the cylinder exists for the airflow.

so the plane would have a slimmer part in the body of the main core .

 

plane2.jpg = what may generally look like, but should change.

front core would be flat, or if need be, for the portions that may not need airflow to the

engines, can be covered/protected by a pattern of metal mesh.

compartments = the tip of it should look like rockets for aerodynamics.

in the grey area = maybe another set of jet engines for power.

 

if it didn't work out, my idea then it didn't. just drawing in case the concept could be of use.

it would provide more safety, as all passenger areas can be detached.

white area = certain amount of depth, so the airline workers can move between

one passenger cylinder to another.