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02-02-2014, 08:03 PM
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#1
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Winnebago Camper
Join Date: Nov 2012
Posts: 12
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"Vanes" on the front of an Itasca Sunrise
There is a 2007 Itasca Sunrise parked near me in the storage lot that has large vertical "fins" or "vanes" on the front corners along side the windshield down to the bumper. Does anyone know what they are for? It looks like it would hurt the aerodynamics. The only thing I came up with was maybe to help stabilize the coach and reduce wandering. It is probably just for style but they went to a lot trouble to add it just for that.
I don't have a picture but you can see what I mean by looking at the brochure sticky.
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02-02-2014, 08:07 PM
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#2
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Winnebago Owner
Join Date: Oct 2009
Posts: 86
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Do they look like this:
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2000 Newmar MADP 4060, 350ISC, Spartan MM, IFS 2011 Jeep JK, M&G Braking, 2014 MTI 27' Hog Hauler, Wireless brake control, 2006Ultra & 1989 Springer
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02-02-2014, 10:56 PM
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#3
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Winnie-Wise
Join Date: Aug 2004
Location: Oregon
Posts: 477
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If they look like the picture above then yes they are vanes and yes they do disturb the air, which is exactly what the owner wants it to do. By doing so you get rid of the vacuum or dead air space that is created when driving. In theory this should improve aerodynamics and mpg's. It should also help with Big Rigs passing you pushing you to the side.
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Retired Navy Submariner
2014 Itasca Sunstar 35F; 5 Star tuned; 2014 Jeep Cherokee TrailHawk
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02-03-2014, 07:08 AM
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#4
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Winnebago Camper
Join Date: May 2013
Location: Mountain West
Posts: 9
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Quote:
Originally Posted by SuperGewl
If they look like the picture above then yes they are vanes and yes they do disturb the air, which is exactly what the owner wants it to do. By doing so you get rid of the vacuum or dead air space that is created when driving. In theory this should improve aerodynamics and mpg's. It should also help with Big Rigs passing you pushing you to the side.
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Right on. Of course, it is not possible to completely eliminate the aerodynamic problem that a square box creates. Additionally, theory goes that that the low pressure 'bubble' behind the MH oscillates back and forth (side to side). This can cause the tow vehicle to get pushed back and forth. These aero devices are to minimize that bubble which then puts less stress on the tow vehicle and 'stabilizes' it as well as the MH.
Maybe someone could talk MythBusters into doing some analysis! 
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JD & Buddy (the ferocious feline) - Full timer out west
2005 Newmar Dutch Star 4023 | 2010 Wrangler (daJeep) | 650 Watts Solar
My Adventures
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02-03-2014, 11:10 AM
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#5
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Winnebago Camper
Join Date: Jul 2012
Posts: 6
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They are called Aero Tabs. I installed them on my beast. Either they work well to damper the pushing effect of large trucks passing or my driving has improved. I know it is a lot easier to control this thing at highway speed than before.
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02-03-2014, 03:37 PM
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#6
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Winnebago Camper
Join Date: Nov 2012
Posts: 12
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Thanks
They are not like the ones pictured. I guess I didn't describe them well enough.
Thanks for the replies.
Bob
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02-03-2014, 03:49 PM
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#7
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Winnebago Camper
Join Date: Apr 2013
Location: Missouri City, TX
Posts: 30
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Quote:
Originally Posted by BobnMelba
They are not like the ones pictured. I guess I didn't describe them well enough.
Thanks for the replies.
Bob
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Is this the picture with the "fins" on the front.
07-Sunrise-bro.pdf
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Don
2003 Forest River Cardinal Platinum 37' 5th Wheel
1976 31' Airstream
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02-03-2014, 03:52 PM
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#8
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Winnebago Camper
Join Date: Apr 2013
Location: Missouri City, TX
Posts: 30
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Quote:
Originally Posted by so47
They are called Aero Tabs. I installed them on my beast. Either they work well to damper the pushing effect of large trucks passing or my driving has improved. I know it is a lot easier to control this thing at highway speed than before.
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Airtab: Aerodynamic fuel savers for truck, tractor, trailer, bus, RV
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Don
2003 Forest River Cardinal Platinum 37' 5th Wheel
1976 31' Airstream
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02-04-2014, 07:09 AM
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#9
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Winnebago Owner
Join Date: Sep 2003
Location: Tucson
Posts: 241
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I read the OP to say they run "alongside the WINDSHIELD".as adonh's photo shows...rgr...
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2004 Winnebago 33V, WH
2010 Honda CRV
Jim, Lynda, and our 6/2010 model Weimaraner, Quincy, aka Q Man
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02-04-2014, 07:19 AM
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#10
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Winnebago Camper
Join Date: Nov 2012
Posts: 12
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Yes that's the picture of what I am talking about. Thanks adon
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02-04-2014, 10:06 AM
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#11
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Winnebago Master
Join Date: Dec 2003
Location: Motor City, Mich
Posts: 1,025
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Purely styling. They changed them to body color for the '08 Sunrise/Voyage. I think too many folks thought they did something when they were black, stood out too much.
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Tim.
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02-08-2014, 06:45 PM
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#12
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Winnebago Camper
Join Date: Nov 2013
Location: Olympia, WA
Posts: 31
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My first question is do they work? And if so why don't we see more of them on the road, either on long line trucks or motor homes?
The Toads
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Dean & Judy, Peanut the navigator
Big Country 2015 3010 RE
Dodge Ram 2500 w/ Cummings.
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02-09-2014, 01:18 PM
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#13
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Winnebago Owner
Join Date: Dec 2012
Location: Northern California
Posts: 75
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Sounds promising. I am going to start looking for them on the road.
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Jeff/Diane, Retired Fire Capt. I.Y.A.O.Y.A.S.
2004 Winnebago Journey 39K on a Workhorse chassis w/ ISC 330, Allison 3000 2013 Honda Fit with Roadmaster Baseplate, BrakeMaster and All Terrain Falcon Tow Bar.
GS#819681685 FMCA#F437136 SKP#112720
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