Quote:
Originally Posted by wmjinman
those big duals plow up a lot of dirt when they roll over it with all that weight. To me, that has to translate to much more dust in the wake.
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To me it is not about the amount of dust, but how the wake lifts that dust into the air and reveals the flow pattern. The pattern behind the streamliner motorcycle is totally different than the yellow Austin, which has dust swirling around all the way to the roof.
Quote:
Originally Posted by aerohead
The photos are great!
If wind tunnels had test sections this long and you could photograph the test vehicle at a far enough distance we'd see the same thing if smoke was introduced into the wake.
This illustrates the magnitude of the wake and its relationship to fuel economy,and how an internal combustion 1987 Sunraycer would achieve 300 mpg.
Hucho could use these sorts of images in his books.
Thanks mucho! I would have liked to have been there.  |
Thanks. It would have been fun if you and other EM folks had also been there. It is worth noting that the streamliner motorbike has a 665cc engine and goes almost 200 mph, whereas the Austin has a 2.0L and goes something in the 150mph range. That's not just dead weight. It has got to be drag too.
Adding more photos.
A Neon with an unusual rail across the roof:
A fifties coupe with that same rail across the roof:
The trailing razor-edge of that streamliner motorbike in my first post:
That thin sliver probably has a lot to do with the tiny wake left behind.
Lastly, and adjustable angle trailing edge for this wing on the back of a car:
-james