Design Tools

I use two tools for designing my models: My mind, and the 3D CAD program, Sketchup. Without becoming too gushy about the program, Sketchup makes it very simple to start with 2D surfaces (virtual paper), and "fold" it into a 3D model. Plus, their measurement tools allow me to make nice instructive images for you all.

examples of Sketchup renders

I still have some work to do to make things presentable for publishing, but it's a start, and it's a heck of a lot easier than taking and annotating photos of each step!

As for my mind, well, until I can find a way to back up that info, I recommend searching the Internet and libraries for planes that you like, and of course reading my tips for designing models.  The techniques I use apply to all kinds of planes, regardless of era and configuration, so try applying them to a plane that you like!