Comment mythbusters tv show (Score 1) 1114
i remember in one of the mythbusters episodes they tested drafting(wind resistance) on a car and how it affected fuel efficiency. wind resistance does make a big difference.
"Going beyond the speculative mathematics of fluid dynamics equations, the Mythbusters demonstrated the principle scientifically in episode #80, confirming the improvements to fuel economy. Using a NASA wind tunnel, the Mythbusters used scale models to demonstrate wind resistance was reduced up to 93% (with a dangerously close simulation of a ten foot following distance). Following the wind tunnel experiment, the Mythbusters hooked a computer directly to the fuel injectors and tailed a truck in a controlled environment, demonstrating gains of 20-40% in fuel efficiency"
http://www.omninerd.com/news/Mythbusters_Confirm_Drafting_Improves_Fuel_Economy