How to model a scale aircraft model in SolidWorks?

I'd insert the image, scale it, and trace over it for each of the fuselage bulkheads. (Start a new part, new sketch, Tools menu, Sketch tools, sketch picture). Extrude for form solids.
Use the Move/Copy command (Insert menu, Features) to position them correctly.

This may help:
Model Aircraft Wing

Thanks, I know this one. My problem is with the fuselage.

I'm working on this tutorial. Have a look
https://www.youtube.com/playlist?list=PL9HaQnX7ItVFirI5X5r4llTKctg5RXzjl

This will help you to know the approach.

Thank you! In the meantime, I've done some models using the same technique you are using, more or less.
Anyway, you are doing a great job with the tutorial. I could find only one tutorial like this on youtube (free) and it has some 20something parts. It's a IL-2 and the SW is set on Russian.
Thanks again and keep up the good work !!!