This is a velocity stack for a 40mm fan (recommend 40x20mm).
Designed for fans with a 21mm diameter hub/motor.
With the right duct and fan combo a velocity stack will help boost the airflow through a duct system, and will also protect the fan from foreign objects. I aim to make all my designs elegant, efficient and effective. The 3Es! Feedback is always welcome.
The design features of this compared to others is:
- Has small holes around bottom to control and boost air flow (boundary layer control).
- Has the right size holes and design so that 3mm socket head bolts can be used.
- Designed to printed without support or brims.
A version with a flat side is also available:
Please check out my other thingis!
Set bottom, sides and top to 0.8-1.2mm
Designed on Rhino 5 from scratch, using vast knowledge of aerodynamics and aircraft design.