NNUF-D

Been watching the fan showdown and other stuff on Major Hardware's youtube channel for a while and while designing a fan profile for a different application i decided to make a copy of it, alter it as best as i can for a pc fan application and see if it's interesting enough to make it into an episode.

It's name is made from where I started with it's design: No Numbers used For Design - NNUF-D

The name is mostly accurate although, the original design i took this from is where I used a 35 degree angle to set up the initial attack angle and moved on from there. From that point, for this design, it's mainly all by eye and i haven't run any CFD for it so for all i know it would just splash air everywhere.

That said i essentially made this to have some fun. I used the hub mesh that he provides on his page and the fan model he has there also as a "bounding box" to keep my blades within spec for the noctua frame.

more images to come after it finishes printing. However i do not have an A12 frame guess i'll just post some images of my calipers showing the dimensional accuracy of my settings.

walls: 2
layer height: .3
line width: .4
brim: 2mm width
supports: i blocked off supports for the blades and only left the supports for the center hub as it's just a flat surface hanging in mid air.

I considered printing this completely hollow but eh, i chose 10%. However, hollow would probably be the best choice to maintain a more balanced piece.

I printed this in carbon fiber petg because It's a new filament to me and i'm having fun testing how it prints and functions compared to the petg i normally use. Also, since this is a turbine of sorts it makes sense to use a more rigid filament to help reduce (centrifugal/centripetal) stretching forces and whatnot.