The aerodynamics of such shapes is quite different from airfoils and wings, but follows some of the the same basic principles.
Bodies including fuselages are important because they produce drag, lift and moment.
They also produce important interference effects with wings and substantially change the stability of an airplane. The flow over more general fuselages and bodies can be predicted in much the same way as the flow over airfoils and wings. Navier Stokes equations are used when flow separation is suspected. In the first part of this section, we examine the results of such calculations rather than the methods themselves, while the second part briefly introduces the concept of slender body theory.