AirTabs shown to work by respected EM member

[2000mc]

Supposing it does work... It may work best at that specific angle, making results difficult to duplicate for others.
Or they might have even better results with a small kammback instead

[Frank Lee]

Originally Posted by ConnClark

He is getting 3% better mileage. That equates to about a 6% reduction in drag. Further more he keeps detailed logs of his mileage and he is getting consistently better mileage than he has ever achieved.

If you would like Julian to try another test just ask him.

I don't see any A-B-A. Anyone purporting to have achieved something as small as a 3% gain had better be using testing protocol that can detect 3%.

[slowmover]

Originally Posted by Frank Lee

I don't see any A-B-A. Anyone purporting to have achieved something as small as a 3% gain had better be using testing protocol that can detect 3%.

I agree, yet I see consistent claims about better trailer behavior where AEROTABS are installed. However much improvment in FE may be present is also open to driver skill (the hardest to quantify). The big truck industry pits drivers of the same company against one another to establish the range of possibility. And that difference is nearly 30%. 3% is hard to tease out.

IOW, I'd try the -tabs on a trailer (and may) and not consider it a waste if the trailer exhibited some better behavior in winds. Around $220 for a kit.

.

[botsapper]

...http://i.imgur.com/4Z0Z6LT.jpg

[Xist]

Originally Posted by slowmover

IOW, I'd try the -tabs on a trailer (and may) and not consider it a waste if the trailer exhibited some better behavior in winds. Around $220 for a kit.

I do not feel like I have contributed much to this forum, even though I spend tons of time here. At most I kind of sort of slightly remember something that I read in one thread sufficiently to find it again sometimes. I did try to marine-shrink my hubcaps, but since they are the bolt-through type, that was doomed to failure.

You need to attach them somehow.

I still have one idea that I will try after finals.

I am reminded of the expression that some people exist to serve as a lesson to others and I think that I have provided some entertainment on occasion. I was thinking that this was something that I could do, just have you guys decide how to scientifically test them and I would do so.

I could record myself reading my notes and then loop that, or something.

Honestly, though, for $220, I just do not see the return on investment. That would be like replacing stock rims with ones that weigh negligibly more, but might be more aerodynamic.

[wmjinman]

Originally Posted by ChazInMT

When it comes to vortex generators....anything to distract from the ugliness is a blessing. Relationship issues? Bring em on!

I wanna know, how do I keep my cat from rolling in the dirt and getting filthy?

Wow, that's a beautiful cat! Thanks for sharing. (I can't have a kitty because I'm terribly allergic - Well, I have had them, but I suffer terribly)

[RedDevil]

Relationship issues... maybe fit for a drag queen?
This is bound to cause a stir!

[slowmover]

Honestly, though, for $220, I just do not see the return on investment.

If you understood that trailer behavior is a concern every foot of ground covered, then the price is cheap (if the benefit is forthcoming). Trailer "wander" causes the need for steering correction. Clear, now?

.

[Xist]

Originally Posted by slowmover

Honestly, though, for $220, I just do not see the return on investment.

If you understood that trailer behavior is a concern every foot of ground covered, then the price is cheap (if the benefit is forthcoming). Trailer "wander" causes the need for steering correction. Clear, now?

It has been a while since I have driven a trailer. I just know that I hate backing up with them.

That makes sense, however, I would not purchase air tabs, a trailer, and a trailer hitch, just for some A-B-A testing, when I would not know what to do with the trailer afterward.

[MetroMPG]

Originally Posted by Frank Lee

I don't see any A-B-A. Anyone purporting to have achieved something as small as a 3% gain had better be using testing protocol that can detect 3%.

Agree completely with Frank.

Julian Edgar has done a lot of really great stuff. But I take issue, respectfully, with the quality of his testing. It's just not on par with his admirable level of DIY & his good writing.

I'm pretty sure I annoyed him on this forum by saying that in another thread he was participating in.