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Old 03-20-2012, 09:59 PM   #1 (permalink)
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Aero Semi-truck butt......

First time I ever say this......it folds up!






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Old 03-21-2012, 01:56 AM   #2 (permalink)
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Still haven't seen a boat tail on a semi but some of the team trucks at 12 Hours of Sebring had smooth hubcaps with an interesting mount on them. Hopefully I can find the pictures I snapped of them.
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Old 03-21-2012, 10:33 AM   #3 (permalink)
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I've been noticing those more and more these days.
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Old 03-21-2012, 12:14 PM   #4 (permalink)
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Looks like any other UFO sighting to me.
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Old 03-21-2012, 01:30 PM   #5 (permalink)
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ATDynamics aero-equipped trailers, getting to be quite a common sight on the I-5, I-10, I-15 & I-40. Long distance runs going in & out of the metro LA transportation hubs and throughout the Southwest.
Look out for these fleets on your highways. Fleets | ATDynamics
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Old 03-21-2012, 08:14 PM   #6 (permalink)
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I'm glad that these are finally catching on. I remember reading about wind tunnel tests that NASA did in the late 1980s or early 1990s where they found that flaps sticking out the back of a trailer like this were something like 80%+ as effective as an actual boat-tail on the trailer.

-soD
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Old 09-03-2012, 09:32 PM   #7 (permalink)
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I saw a couple driving back from California. I think that the first one said "Trucktail" or something. I did see one truck with smooth wheel covers.
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Old 09-03-2012, 09:34 PM   #8 (permalink)
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Oh and I saw one truck with vector generators. I knew that you guys would love that!
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Old 09-04-2012, 02:43 PM   #9 (permalink)
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Quote:
Originally Posted by some_other_dave View Post
I'm glad that these are finally catching on. I remember reading about wind tunnel tests that NASA did in the late 1980s or early 1990s where they found that flaps sticking out the back of a trailer like this were something like 80%+ as effective as an actual boat-tail on the trailer.

-soD
Got a source on that? Interesting.

Good spotting, crews. I've been on the lookout as well.
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Old 09-04-2012, 02:55 PM   #10 (permalink)
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It's always amazed me that an industry driven by cost-per-mile would have almost the exact same MPG today that they had 40 years ago. Considering a 1-mpg increase is actually about a 14% increase...

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