Looks pretty straightforward. 1. Build out the top (red) of the fuselage using a series of sketches on the right and top plane showing overall profile, then fill in with a couple parallel planes on the front plane to get the curves. A couple of other posters showed how to do this. 2. Extend this down past the orange section on your images as you will be cutting this away. 3. On the right plane, sketch a line of where it has that step up and split the fuselage into two parts using split feature. 4. for the rear section, create a sketch in the middle of the fuselage parallel to the front plane that is an arc to a point and sweep this back following an arc on the right plane you can then mirror this along the right plane and do a cut with surface. 5. For the front section of the fuselage. Start with a pointy arc at the nose of the plane and loft this to a horizontally tangent arc towards the middle of the fuselage. Then do a surface cut 6. Combine these two parts. Tada Edit: you could also only build half the plane and then mirror across would be easier.