Somehow we’re supposed to believe that having a roof rack reduces gas mileage by 25%.
I am pretty sure they meant gas mileage is reduced by having a loaded roof rack.
You mean to tell me a Camry that gets 32 MPG will go to 24 MPG? Sorry, that’s a crock of shit.
However, a Hummer, which gets 8 MPG and can carry a shit ton of weight “COULD” get top heavy and go to 6 MPG but how many Hummers (the 4 wheeled variety for you pervos ) are on the road?
For individual drivers that cost is even bigger: depending on the configuration, roof racks can use up to 25 percent of a vehicle’s fuel.
And for the US, that problem is only going to get worse, Autoblog reported Thursday.
Roof racks affect fuel usage by adding to the car’s drag – that is, slowing it down, as air that would usually glide around the aerodynamic body of the car gets caught on the rack, pushing against the car, whether it is carrying something or not.
That means the engine has to fight harder to get up to speed, chewing up the gas – and eating into America’s ever-dwindling supplies of oil.
And things will get worse, according to the scientific research paper, which was published in Energy Policy.
Usage of roof racks is on the rise – with an expected increase of 200 percent by 2040.
That will undo a lot of the work being done to create energy-saving and energy-efficient cars
According to the paper, the good done by fuel cell cars – which use self-contained hydrogen-and-oxygen ‘cells’ that create no emissions and are expected to save energy – will be counteracted by roof racks.
That’s because the drag created by racks will use up six times the amount of energy that fuel cell cars will save.
And electric vehicles can expect to lose 40 percent of their fuel savings to racks in the future.
But there is some hope, according to the authors of the paper, Yuche Chen of the National Renewable Energy Laboratory and Alan Meier of Berkeley Lab.
They suggested that car manufacturers can help by making their racks more aerodynamic and easily removable.
They also said that energy efficiency labeling will help warn consumers of the cost.
And while they said having the government minimize roof rack usage is ‘extreme,’ they believe a combination of policy changes and improved design could save 1.2billion gallons of gas in the US between now and 2040.
That would be almost 11.8 million tons of CO2 emissions – the same amount 86,717 modern cars would emit in the US over that period – Autoblog said.
Government interference is a controversial topic, but that 25 percent fuel saving will look very tempting to many Americans.