Air Tabs
Looking at AD regarding a product called AirTabs. Claims to improve handling and gas milage. Has anyone used this product and how did it live up to its hype. I have not seen any on RVs or tractor trailers during my travels.
Forum Discussion
rgatijnet1 wrote:
MountainAir05 wrote:
Had them on Military aircraft that I worked on but can see how you are going to get that fast on a land Vehicle.
I don't know of too many vortec generators on any aircraft that are designed for high speed. Most are designed to improve the low speed performance, such as decreasing the stall speed, or improving the lift, by improving the air flow over the wings.rgatijnet1 wrote:
MountainAir05 wrote:
FWiW although shaped differently there are vortice generators below the window of a B727, B737 to keep the boundary layer attached to lower the noise in the cockpit and other places to keep boundary layer attached at higher angle of attack.
I had an Aero Engineering friend who did development test in a wind tunnel for the fairrings on top of OTR trucks some 40 years ago now. They were able to quantify the savings by actual research with the loses for crosswinds and other factors.IIRC the average crosswind is about 6kts.
Which is what bothers me about Air Tabs. While NASA has explored the shape, I find no research done to quantify and confirm all the anecdotal evidence in use. A wind tunnel and scientific method is all that is required. If they do what they say you can be assured they would be on every commercial piece of equipment. 2-4% fuel savings is not chicken feed in that discussion.
IMHO- The package of Air Tabs included enough tabs to install them on both sides of my coach, as well as across the roof. I did have to get on the roof to do this but it was easy enough to accomplish. I also had enough left over to install them in front of the wheel wells on the rear duals.
These were purchased to improve the handling, especially during windy conditions and from passing trucks. As an added feature, they keep the rear of the coach and my toad cleaner. I did not expect a return on my investment just like I did not expect to get my money back from Koni shocks or my Blue Ox steering stabilizer.
Money spent to make the coach more enjoyable to drive is an investment in my own comfort. - We see them occasionally on trucks in the north, but as we head south or into areas known to have wind, we see them a lot. Never thought about having them on our motorhome. May be a great idea. I know when the trucks pass that have them on there is no "push" from them.
- How about some facts and actual experience...
- They will not result in MPG savings for non-commercial applications. At 2% claimed by Airtab, private drivers will never pay for the tabs in savings.
- To see the full 2%, you have to install on both sides top to bottom AND the roof which is not often possible.
- They do keep the rear of the trailer cleaner
- I placed them on the rear deck lip of my SUV, and same result, the rear window remains cleaner...longer.
- With the air tabs on the rear desk lid spoiler, the front of the trailer NEVER...and I mean NEVER had a bug stuck to it. Well, at least the width of the SUV, while 6" on either side would get pelted as the whole front would without the tabs.
- There is no doubt the clean up turbulaent ait leaving you trailer and vehicle, but they do not result in any dolllar savings for RV'ers.
- I would absolutely consider another purchase even if I dont see a 100% ROA.
- THEY DO NOT USE FOAM TAPE
- THEY ARE VERY DIFFICULT TO REMOVE!
Hudsoner wrote:
MadsenRV wrote:
Hudsoner wrote:
MadsenRV wrote:
I would recommend the versions in panels/ Strips instead (v-spoilers.com). The Airtabs look silly and impossible to remove without spending countless hours and ending up with bad marks on your RV... Whereas the V-Spoilers do the job, looks integrated, and removable. (and I guess cheaper)
Why would you say that these are easier to remove. Both are attached with 3M VHB tape (the actual version might be different, but removal should be similar)
The Airtabs I know is not with 3M VHB but another type (foam tape) that left foam tape pieces on the vehicle, almost impossible to remove. Maybe there are other versions of the Airtabs with different types of adhesive?
All 3M exterior double sided tapes are based of a foam like substrate. The difference is the density and thickness of the foam. The typical automotive trim adhesive tape uses a very high density, gryisch looking foam as base substrate, other 3M adhesives use more yellowish, lower density foams.
The lower density foams can be initially cut with a thin fishing line or a thin wire, and the residue can be removed with widly available adhesive removers. The gray tape is actually harder to remove, because one cannot cut it that easy.
Actually the gray 3M VHB is much easier as you can peel it off in string (if you get it from the right angle).
Anyhow, Airtabs for sure not using 3M but something that is terrible to remove (my friend had his paint destroyed on the RV)two-niner wrote:
I looked them up but only saw wind deflectors for pickup trucks (panels)??
Here is a link for the panels for trucks and RV's
http://www.v-spoilers.com/videos-galleriesMadsenRV wrote:
Hudsoner wrote:
MadsenRV wrote:
I would recommend the versions in panels/ Strips instead (v-spoilers.com). The Airtabs look silly and impossible to remove without spending countless hours and ending up with bad marks on your RV... Whereas the V-Spoilers do the job, looks integrated, and removable. (and I guess cheaper)
Why would you say that these are easier to remove. Both are attached with 3M VHB tape (the actual version might be different, but removal should be similar)
The Airtabs I know is not with 3M VHB but another type (foam tape) that left foam tape pieces on the vehicle, almost impossible to remove. Maybe there are other versions of the Airtabs with different types of adhesive?
All 3M exterior double sided tapes are based of a foam like substrate. The difference is the density and thickness of the foam. The typical automotive trim adhesive tape uses a very high density, gryisch looking foam as base substrate, other 3M adhesives use more yellowish, lower density foams.
The lower density foams can be initially cut with a thin fishing line or a thin wire, and the residue can be removed with widly available adhesive removers. The gray tape is actually harder to remove, because one cannot cut it that easy.- I looked them up but only saw wind deflectors for pickup trucks (panels)??
Hudsoner wrote:
MadsenRV wrote:
I would recommend the versions in panels/ Strips instead (v-spoilers.com). The Airtabs look silly and impossible to remove without spending countless hours and ending up with bad marks on your RV... Whereas the V-Spoilers do the job, looks integrated, and removable. (and I guess cheaper)
Why would you say that these are easier to remove. Both are attached with 3M VHB tape (the actual version might be different, but removal should be similar)
The Airtabs I know is not with 3M VHB but another type (foam tape) that left foam tape pieces on the vehicle, almost impossible to remove. Maybe there are other versions of the Airtabs with different types of adhesive?MadsenRV wrote:
I would recommend the versions in panels/ Strips instead (v-spoilers.com). The Airtabs look silly and impossible to remove without spending countless hours and ending up with bad marks on your RV... Whereas the V-Spoilers do the job, looks integrated, and removable. (and I guess cheaper)
Why would you say that these are easier to remove. Both are attached with 3M VHB tape (the actual version might be different, but removal should be similar)
