|
I hadn't seen the propeller blade work. I'd seen write-ups on the wings. IIRC, they worked well at keeping the flow over the wings laminar, so there was less lift-induced drag. But they took power to run the compressor, and the grid of very small holes needed were very difficult to keep clean enough to work.
There may have been unpleasant effects at moderate angles of attack as well? I don't quite remember.
The issue of the holes getting plugged was big enough that they abandoned that line of research after a while.
There was something also done with rotor blades for a helicopter? I don't think that one made it off the drawing board, though.
-soD
|