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Well i'm wanting to assume that the sides are about the same, frontal area about the same and similar... i'm just wondering whether it's better for the air to just take one big jump out of the way (some of the 'teardrop' looks have somewhat blunt faces sometimes) or if taking several steps to get there makes any difference for instance.
It's most relevant to research i'm wanting to do to haul stuff - modern cars are pretty smooth and are already made to be aero. Things like pickups, vans, and even larger stuff like semi trucks are not until very recently and could use some serious improvement. The generalizations for boattails, underpans and such seem to apply pretty well for the rears and underside I mean, does anything approach generalizations for the front end? (other than send the air to the sides on a tall vehicle because it doesnt' have as far to go vs going up for like a semi)
I'm wondering if the best shape would favor a fairly slow ramp (like the Airflow Bullettruck), a fairly sharp point (even if not likely to be obtained, similar to the tail treatment on the front), or if even fairly blunt/flat nosed is fine so long as the rear is set up to not leave much wake.
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