Where can I find cheap/free fan blades for my hovercraft?
I have lots of motors; I am just looking for 10-20" fans for my r/c hovercraft. Metal would be preferable, but plastic should be ok (I'll be operating them at around 3,000 rpm). I don't need the expensive high-efficiency low noise blades they sell for hundreds of dollars, just something cheap to lift my 4x2' hovercraft.
If anyone knows where I can find some, I would be very appreciative.