Quote:
Originally Posted by PaulB2
Hard to do since the front face has a curve in it.
That's a pretty small car towing that trailer, heh.
Those roof racks are interesting, but we aren't seeing what is happening at the trailer sides, with a cross wind, etc.
Isn't it true that almost any trailer shape generates lift? The way those streamers look in those pictures are similar to what happens with a wing. Added speed of air over the top causes reduced pressure, which means lift...
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In road vehicle aerodynamics,lift is a function of flow separation,and the low pressure over the vehicle induced by low pressure present at the separation line.It has nothing to do with the displacement of the streamline filaments.
In the image below,the top vehicle would be extremely unstable at speed,whereas the bottom vehicle would be especially stable.
Streamlined bodies are incapable of generating lift,as they have zero separation,or recover with reattached flow.
