Plastic Bottle Rocket Fin Support

This is a support to hold thin cardboard or plastic fins on the lid end of a plastic soda bottle. It is designed so that the bottle lid holds this part on the bottle. I did this so that the part can be moved to different bottles and so that the lid can be drilled to your preferred nozzle size. The fins can be held in place with small pieces of filament pushed through cardboard or small nails pushed through thin plastic. Great for testing different design of fins.