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robert, It's good that your Kammback is clear. You can easily tuft test it with a quick look in the rearview mirror in real time, real world conditions, real driver in driver's seat. I made a coroplast prototype Kammback but couldn't see the tufts by myself and haven't had time to get back to the project.
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60 mpg hwy highest, 50+mpg lifetime
TDi=fast frugal fun 
https://ecomodder.com/forum/showthre...tml#post621801
Quote:
Originally Posted by freebeard
The power needed to push an object through a fluid increases as the cube of the velocity. Mechanical friction increases as the square, so increasing speed requires progressively more power.
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