lol if these actually print they'll weigh about 0.25 grams
I have done much smaller - but not for a few years.
A bit later...well that worked
to put this into perspective. The fan is 12mm diameter and walls and blades are 0.5mm thick/wide.
I went for 5 blades with an overall 30 degree twist.
Figured that gave the best overall airflow to surface area.
But if you want to do proper math and let me know what the optimal number of blades and degree of twist is - be my guest
Gotta wait for the big machine to be free before I can make the special mould this insert is for.
probably be an overnight machine run.
But all things being equal - I should be able to make turbo powered glandes tomorrow
And yes the kit will be for sale.
I'll probably make the fans from PET - which should survive the gland smashing up and be reuseable.
These test ones are just pla - which is tough, but also more brittle than pet.
As you can see -
if you squint, hard things to photograph - I've done a left and right thread.
I 'think' a right handed throw gives a clockwise rotation and a left hand throw an anti-wise one.
Got to find the video of me and the ball david made. That shows the spin quite clearly.
But yeah - this is pretty much a done deal
I have absolutely no idea if it will work or not, but it should turn rotational momentum into longitudinal thrust.
Theoretically.
I think.
Maybe
...............