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Wagging is better than flailing wildly in every direction. That would indicate turbulence which you don't want. Smooth and flat is ideal but as I recall, Metro had some wagging in the video of his cardboard boattail and I believe he still considered it a success.
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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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