GrabCAD
The Blade design depends on theories of physics and aerodynamics. Blade disks are subjected to severe centrifugal loads which lead to peak stress. Twisted blades are used to tackle these issues. Twisted blades increase the velocity and thus makes it more efficient. The twist has to be around 0 to 20 degrees from the root to tip which makes the blade moves faster through the air.
Direct link to the original creator's page
Click the "View on GrabCAD" button above to visit the original model page on GrabCAD. You can download the PTC CREO ELEMENTS, RENDERING, STEP / IGES file directly from the creator's page for free.
This model is compatible with most FDM 3D printers (Creality Ender 3, Prusa MK3S+, Bambu Lab, etc.) and resin printers (Elegoo, Anycubic). Check the original page for recommended print settings and materials.
Yes, this model is available as a free download on GrabCAD. Some creators accept tips or donations.
Check the license (see original page) on the original GrabCAD page. Most STL files can be modified using free software like Blender, TinkerCAD, or Meshmixer.