RV.Net Open Roads Forum: Class A Motorhomes: AIR TABS


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selswood

Miami, FL.

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Posted: 07/19/08 11:40am

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Has anyone installed these on their MH ?

www.airtab.com

2007 National RV Tropi-Cal
2004 Jeep Wrangler

Jerry B

Ozark Highlands

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Posted: 07/19/08 11:43am

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OH NOOOOOOOOO. Search the archives on this subject. Lots of info, some facts and some not.

Jerry B
1996 Dolphin 535,F-53.

Works2RV

Summerville, SC, USA

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Posted: 07/19/08 12:02pm

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Come on - give the guy a break!!

Selswood, it has been discussed and there are differing views - here is a link to search results - take your pick. Welcome to the group - not all of us are this sour

1987 36' Beaver Marquis High Tech Wide body
3208T CAT, MT643 Allison in a Gillig MHA
Koni's & Toyo all around
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hershey

Albuquerque,(fulltime) NM, USA

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Posted: 07/19/08 12:14pm

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99% of every query on this group has been asked before. Every once in a while one of those questions get an intelligent answer.
My thought on the air tabs are that they would have to be very VERY efficient to allow me to put them on my RV. They just look funny. Personal choice.
There was indeed a thread about airtabs and other streamlining devices that eluded to a truckers use of them that was extremely informative.
I found this article by Cummin's to be very informative and shows the relative effect on trucks (simular to an RV I would assume)and this may help you decide if airtabs are our could be a good investment. Cummin's Secrets to MPG

* This post was edited 07/19/08 12:38pm by hershey *

hershey - albuquerque, nm
Someday Finally Got Here
My wife does all the driving - I just get to hold the steering wheel.
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selswood

Miami, FL.

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Posted: 07/19/08 12:37pm

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Thanks
I guess I should have done a search first

KOG

Winterville GA

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Posted: 07/19/08 01:23pm

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When looking at the Cummins stuff bear in mind that a typical Class A MH will have lower aero drag than a semi with full aero reductions (semis are HORRIBLE for aero drag). So aero drag is somewhat less important for your coach than for a semi. of course, you're running less weight as well so weight causes less power requirement also.

The Beave

Georgetown TX USA

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Posted: 07/19/08 03:36pm

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I've responded to this question several times. Yes they do work, yes they look kind of odd.

Under 1 mpg improvement and a noticeable increase in stability. Can I prove it? No, all I can do is compare several similar long trips. Would I do it again? Yes.

On this last trip driving 65-62 and towing a C-RV our avg mpg per tank was 10.5, 10.5, 9.5, 9.5 and 10.4. I'm happy.

The Beave
30' 1997 Beaver Monterey
(The shortest DP we could find)
2005 Honda CR-V
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selswood

Miami, FL.

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Posted: 07/19/08 03:52pm

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The Beave wrote:

Thanks
This is what I was looking for
I did do a search and for the last 2 hours all I saw was people taking about airplanes. I dont own a airplane I was asking about a MH
(Motorhome)
Thanks again