Anyone who has built a kwad copter will probably agree that running the electronics without airflow generates heat.... If troubleshooting, testing or setting up, having a small cooling fan is a great idea.
This is a one off object for a fan i had laying around.
It's not a refined perfect object.
There was some sanding needed to get the feet, mount holes to line up.... etc...
a 50mm fan, 10mm thick
2x 25mm m3 cap screw
2x 30mm m3 cap screw
4x M3 nuts and washers
I split the print into 3, rather then doing a long single print run. It's less time to recover from a bad print.
I used supports for the first 2 mm of the print.
Clean off the supports carefully.
I printed in ABS, and fused the print with acetone. A Q-tip full goes a long way.