Jeff Peterson shared on Thingiverse:
Another variation of the Raspberry Pi model 2 . This one uses an 80mm fan in the base. I made the first pictured at a fast low resolution speed. Made a couple tweaks and putting it up for review. I will print this tweaked version later this week. So stay tuned I may update if I find any other issues. I added a cone inside layer 2 that forces the air right up to the Pi and then has to roll down the sides to exit the honeycomb vents.
Have to attach PI to layers 2 and 3 first. Make sure to plug fan into Pi before mounting because after layer 2 and 3 together ( using 4 m3 x 16mm screws ) you cant really reach up into it very easily. Then you can place fan into base and then attach layer 1 , base , to your assembled layer 2 and 3. I used 4 #6 x 1.25 long screws to mount layer 1 to layer 2. no tapping required I found on this version everything went together by hand.
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