I 3D printed a rotor for an EDF (high reaction compressor stage) and paired it with a store bought duct/stator. I ran it up to 40,000 rpm and it survived!
Unfortunately, it drew considerably less power than I was expecting from my calculations… I have to figure out why…
that might be the surface texture, i would try to find a way to smooth it , i think a rough surface would act much like the divots on a golf ball.
@mike_mackenzie-griev dimples on a golf ball reduce drag and increase spin. The most likely problem is the leading and trailing edges of the blades not working, lack of true radii looks like the biggest culprit.
Perhaps my prediction is wrong or maybe the blades are stalled. Hard for me to say at the moment.
I’m going to build a test bench with intake/exhaust ducts. I’m going to measure rpm, pressure rise across the fan, thrust and power. This will take me a while to setup.
it was just a thought i had thats all, i am not a expert in that field, though i am glad to see that printed parts took that rpm,
I sometimes wonder if a ducted fan quad copter would perform well
i don’t see why not. some designs i have seen with guards are not far off a ducted fan.
