Aerodynamics
Ok, before you start this seems a bit off the wall to me too. I have been reading about mods to trucks involving sealing off the bottom side to improve air flow. Seems like a lot of work to me. But I ...
Forum Discussion
The costs for truckers work out because they drive 200-250K per year.
The under skirts on trailers give 0.3 to 0.4 mpg improvement under 65 mph, about 0.1 to 0.2 mpg at 75 from what I read. If you put eight thousand dollars into a trailer, you might get 0.7 mpg improvement.
If you run 250,000 miles per year at 8.1 mpg vice 7.4 - you burn 2,919 fewer gallons of fuel @ $4 per gallon - you save $11,676 dollars per year. A trucker can also save about 0.25 to 0.3 mpg by going to wide fat rear tires rather than duals - at about $1,200 per axle.
If you tow 25,000 miles per year - a 0.7 mpg improvement is a savings near $1,676 per year.
Dropping your cruise speed from 70 to 60 will save about the same amount, to 55 another 0.6 to 0.7 mpg.
The under skirts on trailers give 0.3 to 0.4 mpg improvement under 65 mph, about 0.1 to 0.2 mpg at 75 from what I read. If you put eight thousand dollars into a trailer, you might get 0.7 mpg improvement.
If you run 250,000 miles per year at 8.1 mpg vice 7.4 - you burn 2,919 fewer gallons of fuel @ $4 per gallon - you save $11,676 dollars per year. A trucker can also save about 0.25 to 0.3 mpg by going to wide fat rear tires rather than duals - at about $1,200 per axle.
If you tow 25,000 miles per year - a 0.7 mpg improvement is a savings near $1,676 per year.
Dropping your cruise speed from 70 to 60 will save about the same amount, to 55 another 0.6 to 0.7 mpg.
