The Shape of German WWII Aircraft Fuselages

[Akagi_Apus]

Why Ju288 or he 217 177 have fuselage approach rectangle ？ There Are so many different fuselage Design in luftwaffe, What's purpose for those?Productive ability , Volume or just some habit?

 

[riggerrob]

Flat fuselage sides are a simple way to smooth airflow around wing roots.
The opposite extreme is the complex, elliptically curved bulkheads and huge complex curved wing root fairings on Spitfire.

 

[T. A. Gardner]

Less bending of the metal used to make the airframe and skin... Simplifies production.

 

[Scott Kenny]

Why Ju288 or he 217 177 have fuselage approach rectangle ？ There Are so many different fuselage Design in luftwaffe, What's purpose for those?Productive ability , Volume or just some habit?

It's much easier to produce flat panels and then roll a few corners.

Cylindrical fuselages tended to be reserved for pressurized cabins, or for fighters using radial engines.