[cuttysnark]

In the video, we see the students briefly rotating the model in the CAD software—with translucency on—it looks like the one main stream is divided into many spiral chambers which then exit distributed along the rim of the attachment's opposite side.

With that in mind, I wonder how much, if at all, the reduction would be if the entire nozzle were designed this way, instead of just the end bit.

[hinkley]

They probably should look at this for server cooling as well. At 2u or smaller those things are leaf blower loud, and there’s a lot of depth in those cases that could be sacrificed for decibels.