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Originally Posted by ECONORAM
What exactly is the purpose of the "wing" being elliptical?
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It was the largest scrap piece of acrylic I had left, having used the larger pieces on my hovercraft to in effect extend the length of the thrust duct with fixed elevators (or wings). I suppose a rectangular shape would work just as well, perhaps I'll attempt a comparison one day to find the best shape.
The hovercraft uses rectangular shapes by the way.
http://www.boatdesign.net/forums/boa...t-11973-2.html
The middle elevator and rod supports were later removed.
Quote:
Originally Posted by ECONORAM
I had expected you'd need the wing to flush mount with the cab for the best results, but based upon the previous picture (in yellow) you posted, some flow under the wing is desired?
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My original intention was to seal the wing to the roof which is why I beveled the leading edge to begin with.
However before I committed to putting silicone on my truck and perhaps more holes I tested it without sealing and liked the results, which then lead as to the how and why it works "as is".
Yes, air getting under the slot is desired (in most cases), just look at all the econoboxes and SUV's which use similar treatments.
Do a Google image search with the term "SUV spoiler" to see more.
Quote:
Originally Posted by ECONORAM
What inspired the rear spoiler exactly?
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The rear spoiler was inspired by the racing trucks, it has a piano hing and allowed me to experiment on the various angles (90-180) to balance down-force with fuel economy. The hinge has long since rusted set at a permanent angle.
There is a link in my signature below which explains more.