40mm Fan Intake Trumpet

thingiverse

40mm Fan Intake Trumpet Required: Two Empty Mounting Holes Needed Use Wood Glue or Teflon for a Tighter Fit If Necessary. Noticing that most 40mm fans produce a torus of air rotation on the outer edges of their blades due to manufacturing or design margins, I realized this only moves air around the outside of the fan, rather than pushing it through efficiently. The intake trumpet enhances inlet velocity and directional flow vectors, boosting efficiency. Perfect for filament cooling fans with small outlets, which often reduce fan throughput flow, increasing the torus effect. Adding a trumpet increases cooling ability! I Recommend Printing with ABS and Smoothing the Surface with Acetone to Reduce Wall Roughness.