Frank, I remember we had a conversation on another post related to drafting. I asked about tailgaters, and whether or not they hurt your FE.
I forget what the verdict was on that.
I remember the point that the vehicle behind you supplies it's own power, and this offsets any parasitic 'drag' - as in drag on your own vehicle.
Still, it would seem to me that eventhough they supply their own power, they add to your overall frontal area and wake size ( if there is a large SUV tailgating you.)
Besides, their vehicle now provides less power to the vehicle in front, since it has less drag to overcome.
I still slightly confused still about that.
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