H.Evan'sRV7A
Well-Known Member
I have been a heretic on this subject for quite a while. Most prop designers compensate for "slowdown" of the inbound stream resulting from the body behind the tractor prop (prop in front of cowl). I think that this is very poorly understood and that the designers are missing a lot. This post will not be a full discussion. However, I just came across this video of the aerodynamics of the FIFA soccer ball and it struck me that I cannot see any slowdown. I see deflection, but less than I expected and not as far forward as I expected.
What do you see? What would you say it means for [tractor] prop design?
Ames Research Center Tests World Cup Soccer Ball - YouTube
What do you see? What would you say it means for [tractor] prop design?
Ames Research Center Tests World Cup Soccer Ball - YouTube