Yet Another Wind Tunnel

A small wind tunnel for testing aerodynamic drag on parts.

There are 2 velocity mount inserts, one uses paper straws bundled together and the other is fully 3D printed. The fully 3D printed one will use a reel of filament (~1kg). The straw velocity mount uses much less but requires more work to cut the straws to 5cm and bundle ~600 of the cut straws together (See photos).

There are also a couple of sizes of MDF/Acrylic sheets in the downloads. The length of the MDF and acrylic in the picture is 550mm which is definitely long enough for most objects that would fit in the wind tunnel. If you plan on using a longer pieces of MDF/acrylic then I would get a thicker bottom sheet or I would find a way to support it to stop it from bending as much. I bought the acrylic from [cutmyplastic](https://www.cutmy.co.uk/plastic/acrylic-perspex-sheets/clear/3mm/L700-W205/) and got the MDF from [Kitronik](https://kitronik.co.uk/products/43172-clear-perspex-sheet-cast-3mm-x-600mm-x-300mm) and cut it i