how does X-Plane represent the aerodynamics non-aerofoils like the fuselage, for example?
A couple of years ago we discovered a huge error on the fuselage/body lift model.
Actually we managed to get a WINGLESS B777 to stay in the air at
an AoA of about 15 deg about FL100! After numerous atempts to
get Austin to change the model we ran out of arguments.
Then, finally, we accidentally got in contact with the CHIEF DIRECTOR of Aerodynamics
at NASA Dreyden (!). Austin finally backed down and the modell was changed
A rocket body has pretty much the same issues as a fuselage.
Don't know all the details, but we know it's based on length and frontal area. Possibly also the 3D shape to some extent, at least for
supersonic flight. Lift, drag and downwash is calculated. Parasite drag is entered by the designer since this will vary from design to design.
Cheers,
M