This is my very first 3d model in Sketchup. It's the Flite Test FT Cruiser, modeled using the free build plan that I imported into the file as well. All pieces and the complete plane itself are modeled around 5mm thick foamboard.
It's not perfect, some things didn't line up the way they should, so I had to adjust the proportions a tiny bit in the nose area.
Hope you like it!
Edit: I improved the grouping of elements a bit. I discovered that feature far too late into the build haha