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HUCHO on convoy drag (drafting)
Hucho's "Aerodynamics of Road Vehicles" is a classic textbook folks on this forum often cite as an authority. Attached photos are of a few charts from the section on convoy driving. I took these shots, but I don't have the book in front of me so I have to tell you the argument from memory. The gist is that really close is not as good for road vehicles as it is for race cars, which are higher drag vehicles to begin with because of the downforce racing teams want. For road vehicles, driving within large groupings of cars (convoy) or at more of a distance (not bumper-hugging deadliness) is better for drag. Anyone care to correct me? That's my read.
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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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