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Interesting article. Thanks for posting the link. My big takeaways: Testing is hard even for professionals. There are things that can be done to reduce aerodynamic drag in box trucks. It really depends on the intended use of the truck whether it is worth doing or not. For city trucks the extra weight may hurt efficiency.
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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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