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how close?
The highest benefit is @ zero-gap, then degrades from there as shown in the pictorial graph.
This graph was intended for the 'fully-boat-tailed, gap-filled trailer' invention, as well as the bus pictorial graph.
You can see where the sedan hits Cd0.315 @ infinity, it's 'naked' Cd.
At that distance between the two identical cars there's no effect.
The buses react differently depending on position, showing a change at distances of 20-meters, 62.5-meters, and 50-meters, depending.
The NASCAR racers are Dodge Chargers, circa 1968. You could do a search for their exterior dimensions. That's what I did.
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Last edited by aerohead; 11-01-2022 at 02:46 PM..
Reason: add data
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