I printed the 2.0 version at 70% scale, at full size this thing would be HUGE! :)
It has some slight defect/improvements that could be made. There was an errant collar section on the fins (this has been corrected), and the fan seems a little tight.
The inner hole diameter needs to be larger as I had to ream the hole larger for it to spin correctly, also the entire fan could be a bit shorter as when the head is screwed on, it locked down tight against the fan making it immobile.
I put the fan in with the collar down, so there is less contact with the whistle section as is spins, this is upside down according to how it was intended by the renders.
Overall, awesome. I cant wait to get it all working and give it a toss.