Does a truck work extra to pull a drafting car?
March 10, 2007 9:11 PM Subscribe
Does drafting a truck theoretically lower the truck's mileage?
posted by condour75 to Science & Nature (19 answers total) 3 users marked this as a favorite
There have been a few articles about the practice of hypermiling (most recently I saw it on MotherJones
.) Hypermilers try to extend their gas mileage to extreme lengths, and one of their more dangerous practices is drafting a truck -- tailgating it to ride the vaccum the truck creates as it moves forward.
I blogged a little about this and mentioned that the drafting is technically zero-sum for the environment since the truck must use more gas to make up for towing the car. My brother disagreed, and suggested that the energy of the vacuum would otherwise be exerted on surrounding air.
Could this be one of those infuriating puzzles like the jet and the conveyor belt
, or is there a simple answer?