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Old 04-14-2013, 11:25 PM   #11
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I asked about them once.
I am not concerned about mpg gains, it is the stability gain I was curious about.
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Old 04-14-2013, 11:33 PM   #12
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I asked about them once.
I am not concerned about mpg gains, it is the stability gain I was curious about.
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All I can say is they definitely help the stability. As I said before, I put them up both sides and across the top.
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Old 04-14-2013, 11:37 PM   #13
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All I can say is they definitely help the stability. As I said before, I put them up both sides and across the top.
The photo you posted was a TT. Did you put them on your 5W too?

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Old 04-14-2013, 11:41 PM   #14
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The photo you posted was a TT. Did you put them on your 5W too?

Dave
No, haven't had a problem with semi's or buses yet on the 2 trips to FL. If I encounter the problem on the Goshen-IL-MO-AR trip, I will buy enough to do the same on the 5ver. They did help tremendously on the tt.
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Old 04-15-2013, 08:00 AM   #15
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Affect for stability when being passed by a semi-truck.

With a large truck passing me on my left I typically feel a push to the right as they start to pass and then just as I see the end of the trailer going by, I feel a pull to the left.

How would installing the air-tabs on my coach (to mitigate the vacuum behind my vehicle) help with either of those effects?

It seems to me I need the driver of the large truck to install them on his rig to mitigate this push/pull effect when he passes me since it is his rig pushing air out front that pushes me off the road and then the vacuum behind his trailer that pulls me back to the left.

As you can tell I don't fully understand how creating these vortexes around the rear of my rig helps me with the push/pull.
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Old 04-15-2013, 08:06 AM   #16
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Affect for stability when being passed by a semi-truck.
...As you can tell I don't fully understand how creating these vortexes around the rear of my rig helps me with the push/pull.
Don't know how or why they work, but from my experience with them for over 4 yrs, they work.
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Old 04-15-2013, 05:26 PM   #17
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Affect for stability when being passed by a semi-truck.

With a large truck passing me on my left I typically feel a push to the right as they start to pass and then just as I see the end of the trailer going by, I feel a pull to the left.

How would installing the air-tabs on my coach (to mitigate the vacuum behind my vehicle) help with either of those effects?

It seems to me I need the driver of the large truck to install them on his rig to mitigate this push/pull effect when he passes me since it is his rig pushing air out front that pushes me off the road and then the vacuum behind his trailer that pulls me back to the left.

As you can tell I don't fully understand how creating these vortexes around the rear of my rig helps me with the push/pull.
Roll,
Go to the following site and read the ExpediteNow.com Article and the Family Motor Coach Magazine PDF. It will explain things a bit better. Essentially the interactions of both stern (rear) wakes and bow (front) wakes causes the effect you are describing, it is a push as your stern wake interacts with the other vehicles bow wake and a suction as your bow wake interacts with the trucks stern wake. The reversal of the effect you are seeing occurs as you change roles (his bow your stern, your bow his stern, dynamic wake reversal). By eliminating one of the wakes, there is no to little interaction which greatly reduces the effect.

http://www.airtabs.com/news.html
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