It was my tryout to build old military helicopter Bell AH-1 with my CAD software MOI3d.I simplified it and I did not followed strictly image references.It looks pretty nice even it does not look like original Cobra. There are no interior objects.I uploaded STL and OBJ files.With OBJ zip file there is materials file too,so you can customize it as you wish. Check for my screenshots there are 10 parts all solid watertight as you can see on screenshot from my CAD software.I also put close ups for you to see rotor parts,which can spin.I left some gaps