multiple air dams??
 

has anyone ever installed an airdam in front,one in the center,and maybe one in the rear?

How the concept works eludes me, especially the one in the rear. :confused:

What are you thinking the centre and rear dams will do? More air deflection? Or do you mean side skirts and rear diffuser?

the concept, is for the second one to block some of the air that does not get blocked by the first airdam.the third might not even work.does this concept still elude you?

A belly pan will probably work better to smooth out the airlflow. More air dams seem superfluous.

Yes it does.

I can picture how they could be mounted and how they might look; that isn't the issue. The issue is, airdams (in the front anyway) work not because they are sleek, but because they direct air flow from draggy areas to less draggy areas. So for instance if I were to put one in front of the rear axle on my pickup, what exactly would it do? The "flow" under there is already a complete turbulent mess... it would shield that axle though... directing air up above, like to the floor of the box and all that nasty chassis stuff wouldn't help so a before axle dam would have to go up as far as it can? And/or be angled such that it tries to direct air down to the road? Or out to the sides?

And then there is the idea of one on the back. The very back? Where we are trying to make the wake zone smaller? I guess I can kind of imagine where trapping a rolling wave similar to why it is said that pickups are better with the gate up are better... but.... eh, I don't think the flow situation is the same down there next to the road.

The only thing I could see is two "mini dams" to direct air away from the rear tires.

Like Frank said, once the air is under there you will just be adding drag.
Now I have considered trying a sortof wedge shape cross between sideskirts and an air dam in front of my rear axle to force air out .

[QUOTE=Frank Lee;270789 So for instance if I were to put one in front of the rear axle on my pickup, what exactly would it do? The "flow" under there is already a complete turbulent mess...
[/QUOTE]I was thinking in front of the axle,before the floor curves.Ok, the rear one was a bad idea.

Just do Prius style air deflectors in front of the wheels and call it a day!