Quote:
Originally Posted by CFECO
"The air whisking by would bowl it over, right? "....???
Anytime you "make" the air change direction, it creates drag.
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This is a complex condition to analyze, it's challenging the limits of my understanding to be honest.
There will be forces to overcome as the air diverges in this duct and is blunted somewhat by what ever radiator or cooling exchanger is in there.
My earlier comments were actually concerning the other matter which is reintroduction into the airflow.
The lower pressure air will be slapped back towards the body and not be ejected very far outward I predict.
I suspect that one could make the exit air flow discharge opening too large and lower the pressure so much that it never gets forced though and back out the side. In such an instance the flow may even be reversed as it is when opening a side window at speed. In this situation the air flows into and out of the cabin quite turbulently in a oscillating (buffeting) fashion.
Look real close at the original image, it might not be a 90 degree elbow. I detect quite a bit of bending, hard to tell for sure without a plan view or drawing.
EDIT: It's looking even more 90 degrees here............unfortunately.
http://fancytuning.com/2012/06/champ...sr/#more-20116
MORE:
http://www.m3forum.net/m3forum/showthread.php?t=417938
Plus some rear end action....................
http://moyanophotography.com/automot...3/default.html
As I understand it, the fan will not draw well because it's not sealed, a pusher fan on the other side could get away with this.
Poor engineering on at least that count.