Open-design, modular wind tunnel

Open-design, modular wind tunnel Disclaimer: Also check out the masterpieces by @Jerrodh and @pobriant. Description:I present an open-design, modular wind tunnel that you can use to explore the behavior of airflow around different obstacles. Benefits:Affordable and easy to print and assembleRequires minimal additional materialsOpen design, allowing you to create and customize your own modulesDisadvantages:Airflow is not perfectly stableProduces a significant amount of smoke Filaments used:PLA basic and PLA mattePETGTPU (Optional if you want to use manual gearbox) Additional Materials:Transparent A4 plastic sheets: Used for constructing the tunnel walls. The required amount depends on how long you want to build your wind tunnel.4x12x4 mm bearings (604-zz): You’ll need 2 to 13 bearings, depending on whether you want to include a basic manual gearbox to power the fan blade.Paper and machine oil: For smoke generation. I recommend sticker paper, as it comes in the perfect size for use in th