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03-30-2011, 04:30 PM
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#1 | | THEY HATE US CUZ THEY AIN'T US
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| Spoiler Alert: Downforce Accessories May Concentrate Pollution
 http://wheels.blogs.nytimes.com/2011...emc=wheelsema2 Quote:
Like the tail fins of yore, rear spoilers on the majority of today’s passenger cars are primarily appearance enhancers, not downforce tools, because the benefits of downforce are only apparent at high speeds. A new study suggests that rear spoilers do serve a dynamic purpose — one that might induce coughing fits in transportation-design classrooms.
Aonghus McNabola, a lecturer in the engineering department at Trinity College in Dublin, concluded in a recently published paper that rear spoilers set at certain angles created plumes of tailpipe pollution at the head height of pedestrians, cyclists and motorists who might follow in a car’s wake.
Dr. McNabola’s research was based on modeling, not real-world testing. Five different hypothetical spoiler-setup experiments were conducted, all taking into consideration variable wind and car speeds.
Dr. McNabola’s study found that the spoiler configuration with what the scientist called the greatest angle of attack — 20 percent in the study — “showed the most discouraging results with a significant increase in benzene concentrations at head height of over 40 percent.”
On the bright side, one of the flat rear-spoiler designs tested actually decreased those same concentrations by 18 percent.
“If the spoiler is flat it can have a positive effect,” Dr. McNabola said in a telephone interview. “But at angles greater than zero it leads to an effect that could contribute to the overall exposure of someone cycling, walking or even driving behind the car.” He said that the spoiler’s placement on the trunk does not matter as much as its angle.
“The spoiler won’t change the amount of pollution, just the concentration,” Mr. McNabola said. “Our main conclusion was that automakers can design spoilers to reduce their impact on air pollution.”
Jeff Gearhart, a senior auto researcher at the Ecology Center in Michigan, said that automakers should consider such findings before committing to designs that might concentrate pollution. “Since most of these spoilers are design rather than functional elements, there’s no reason they can’t design them to minimize pollution,” he said in a telephone interview.
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03-30-2011, 04:36 PM
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#2 | | RS.net, helping ugly ppl have sex since 2001
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“The spoiler won’t change the amount of pollution, just the concentration,” Mr. McNabola said. “Our main conclusion was that automakers can design spoilers to reduce their impact on air pollution.”
What reduction of impact is he talking about if there's no change in the amount of pollution?
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03-30-2011, 04:46 PM
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#3 | | '
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are you sure the article is from a legit source?  | |
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03-30-2011, 04:46 PM
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#4 | | G'd up! w000weee
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^exactly what i was thinking  | |
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03-30-2011, 05:49 PM
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#5 | | Rs has made me the man i am today!
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| Quote:
Originally Posted by shenmecar  What reduction of impact is he talking about if there's no change in the amount of pollution? | impact as in effects on health?
the same amount of air pollution concentrated in different areas can have different impacts right? ie. why chimney stacks r so high up, so they go up in the sky and not onto street where people breathe it in
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03-30-2011, 05:58 PM
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#6 | | I don't get it
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SPOILER ALERT
I saw what you did thar  | |
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03-30-2011, 06:11 PM
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#7 | | THEY HATE US CUZ THEY AIN'T US
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Originally Posted by 737! are you sure the article is from a legit source? | Ha..ha..hahaha no it's not legit. Posted via RS Mobile | |
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03-30-2011, 08:11 PM
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#8 | | I bringith the lowerballerith
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snape kills dumbledore on page 606
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