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Very interesting case, but your last line in post 29 does seem like a straw man argument. Nobody is arguing that absolutely any road vehicle body that someone classifies as "streamlined" is of zero lift shape. "Properly streamlined" I am sure I have seen claimed, but "properly" is a big qualifier. Seems to me Honda probably knew this shape created lift and that they may have tuned this car for a little lift to reduce rolling resistance. A question I would have would be whether this lift is dangerous. I wonder what degree of lift under yaw will "lift" the car off the road. Were there race rules that would stop the race under certain wind conditions. I would think there might have been given the lighweight and wing like shape of solar racers.
I gotta add one edit: up to 100 kph, lift is pretty modest and the car ran at about 90 kph. And I definitely have not seen anyone argue that a streamlined body under yaw would produce no lift. It is an interesting study but it proves less than you seem to think.
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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