Improving MPG - Fiberglass RV


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Old 09-29-2013, 05:24 PM   #1
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Improving MPG

... there's an interesting thread going on over on the Casita Forum: http://www.casitaforum.com/invboard/...improving-mpg/

for those of you that can't see it, they're discussing this mod... note the Casita info about half-way down the page. Aerodynamic truck, trailer, RV add on for fuel saving, stability, safety

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Old 09-29-2013, 05:35 PM   #2
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I like the pizza pan wheel covers.
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Old 09-29-2013, 05:37 PM   #3
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I did too Tom. Big disks, kinda old skool. Remind me of rodded Mercs.
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Old 09-29-2013, 05:39 PM   #4
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I did too Tom. Big disks, kinda old skool. Remind me of rodded Mercs.
Exactly - influenced by salt flats cars.
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Old 09-29-2013, 06:16 PM   #5
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$220.00

Products to Improve Gas Mileage and Improve Engine Performance
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Old 09-29-2013, 06:25 PM   #6
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I wonder if you could just glue on some dust pans from the dollar store?
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Old 09-29-2013, 06:46 PM   #7
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Just buy an Airstream...

There are some real deals out there if you don't mind a fix-r-upper...
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Old 09-29-2013, 07:06 PM   #8
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The AirTabs show up about every 2-3 years on several motorhome sites I am on and, so far, other than posts(?) by those wanting to justify their $200+ investment, about all I see that's valid is an Egg owner that claims they keep the back window cleaner.

Wouldn't one think that if even a .1 MPG increase was possible that every OTR truck in America would have these things by now and that at least a few coach builders would install them at the factory to hype better handling and economy????

I might have been born at night, but it wasn't last night.....
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Old 09-29-2013, 07:19 PM   #9
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Snake oil then? I thought someone like Mike who tows his LilHauley for a living might find it of value and it does keep the back end cleaner which is were his door is. I know I wouldn't put something like that on my trailer if it blocks the windows.... I'll just drive slower
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Old 09-29-2013, 08:37 PM   #10
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Hrumpff ...

Here's the details from their website. Note the phrase "but the theory" and "results may vary" ...

Airtabs™ are patented, unique wishbone shaped vortex generators designed to increase vehicle aerodynamic performance and fuel economy by reducing aerodynamic pressure drag at two key locations; the tractor-trailer gap and the rear facing surface (the base area) of any commercial or private square backed vehicle or trailer that routinely attains highway speeds. Drag reduction and fuel economy benefits from Airtab® application is not limited to commercial trucking operations. Airtabs™ enhance aerodynamic performance equally well on cube vans, straight trucks, expeditors, SUVs, RVs, buses, horse, toy and utility trailers, faired "bob tail" tractors, flat beds and tankers. The results may vary somewhat with vehicle type but the aerodynamic theory and principles are the same for all.
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Old 09-29-2013, 08:57 PM   #11
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Nope, I am pretty skeptical of the airtabs.
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Old 09-29-2013, 08:59 PM   #12
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Well, I tried I'm still going to follow the CasitaForum thread....
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Old 09-29-2013, 09:15 PM   #13
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These are the real deal
Vortex generator - Wikipedia, the free encyclopedia





Commercial ones



Real VG's have sharp edges since they are intended to create turbulent wakes. Rounded off edges and such weaken that effect. But the RV owners probably complain about getting their hands cut on them while washing the RV.

I think the claims made on the website are pretty outrageous.
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Old 09-29-2013, 11:05 PM   #14
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Quote:
Originally Posted by Donna D. View Post
Snake oil then? I thought someone like Mike who tows his LilHauley for a living might find it of value and it does keep the back end cleaner which is were his door is. I know I wouldn't put something like that on my trailer if it blocks the windows.... I'll just drive slower
Sounds strange to me, my Scamp gets plenty dirty on the front due to TV tires,but the trailer stays clean at the rear.
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