Velocity Stack and Fan Guard for 40mm Fan (round)
thingiverse
This is a velocity stack for a 40mm fan (recommended 40x20mm). Designed for fans with a 21mm diameter hub/motor. With the right duct and fan combo a velocity stack will boost airflow through a duct system, protecting the fan from foreign objects in the process. I aim to make all my designs elegant, efficient, and effective – The 3Es! Feedback is always welcome. This design features stand out from others in several key ways: It has small holes around the bottom that control and boost air flow (boundary layer control). The right size holes and design are used so that 3mm socket head bolts can be screwed into place. Designed to print without support or brims. A version with a flat side is also available at: http://www.thingiverse.com/thing:2211722 Please check out my other things! Print Settings Printer: Any Rafts: No Supports: No Resolution: 0.2 - 0.25mm layers Infill: 25-35% Notes: Set bottom, sides and top to 0.8-1.2mm How I Designed This Designed on Rhino 5 from scratch using vast knowledge of aerodynamics and aircraft design principles.
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