[quote="AtomicLabMonkey"]
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Originally Posted by Dean
This is not a jet, so the thrust wash should not be that bad, espcially since the plane is already at speed, not doing a brake stand at the end of the runway... The prop is turning it's way through the air like a screw producing lift, not pushing air behind it like a jet!
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Screw may have been a bad choice of words, but it provides a good visual analogy.
While propellers and turbines are similar, Either generation of force is reffered to scientifically as thrust, but the general population equates thrust more with a leaf blower than a wing passing through the air. A turbine functions more like a leaf blower than a wing, while a propeller acts more like a wing than a leaf blower. (From your refference: "The propeller acts like a rotating wing.")
I guess it's a question of which pressure area is doing more work. As I understand, on a propeller, it is the low pressure in front of the blade that pulls the plane through the air as much if not more so than the high pressure behind the airfoil pushing it through the air. On a turbine, the high presure area at the rear of the turbine contributes a much greater force than the low pressure contribution at the front.
I guess the bottom line in this discussion is which generates a more focused column of air that might have "impacted" the guy standing there, and all I was trying to say was that props, especially ones that are already in forward motion, don't generate the same column of focused pressure that a turbine does. Would you buy that?