I was inclined toward articulated paddles that would slide sideways as they release the air, so I could see that. But I can let that idea go as easily as I picked it up.
Quote:
|
...any wind tunnel worth its salt will have the propellers distanced far enough away from the test area that any vortices generated...
|
So propellers do create turbulence too. I thought paddlewheels fell out of favor because of their size compared to propellers.