Quote:
Originally Posted by Frank Lee
A restriction is a restriction no matter what form it takes.
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Sorry, but that is like saying that, dragwise, a car is a car no matter what form it takes. If you have some actual data to support the idea that the air flowing over a partially closed plate and through a tube has less turbulence than the air flowing through a freewheeling or motor-augmented archimedean screw, then fine, but just putting forth such an oversimplification without justification is pointless.