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> Air Deflector, For my trailer
Randal
post Apr 8 2010, 04:08 PM
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QUOTE(URY914 @ Apr 8 2010, 01:58 PM) *

You need three lights aross the top like the big rigs have. (IMG:style_emoticons/default/shades.gif)

Looks great! (IMG:style_emoticons/default/biggrin.gif)



Now lights would be cool!
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PeeGreen 914
post Apr 8 2010, 04:55 PM
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Looks awesome (IMG:style_emoticons/default/aktion035.gif) I would bet it will help protect whatever you are looking to tow as well. (IMG:style_emoticons/default/beerchug.gif)
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Randal
post Apr 8 2010, 09:28 PM
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QUOTE(Phoenix 914-6GT @ Apr 8 2010, 03:55 PM) *

Looks awesome (IMG:style_emoticons/default/aktion035.gif) I would bet it will help protect whatever you are looking to tow as well. (IMG:style_emoticons/default/beerchug.gif)




Paul, maybe someone else as well, said it would better mounted higher to get air flow over the car, so that is what I did.

It's adjustable, so I just have to try different settings.
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Randal
post Apr 9 2010, 07:18 AM
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QUOTE(Phoenix 914-6GT @ Apr 8 2010, 03:55 PM) *

Looks awesome (IMG:style_emoticons/default/aktion035.gif) I would bet it will help protect whatever you are looking to tow as well. (IMG:style_emoticons/default/beerchug.gif)



Should do a good job of that, given the height.

Thinking about what you said brought up an interesting idea. What makes the white fog like they use in wind tunnels to view air flow?

It would be pretty easy to video it at speed as long as you could figure out something allowing you to visualize the air flow.

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PeeGreen 914
post Apr 9 2010, 04:02 PM
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I think they actually use a machine that is similar to the party fog machines. That would be a cool test to conduct (IMG:style_emoticons/default/smile.gif)
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DanT
post Apr 9 2010, 10:36 PM
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Randal, your tires on your tire rack give you more drag than the car does...IMHO
Once you move the air over the tires it should continue right over the car.
Other than keeping rocks and debris off the front of your car, I doubt you will see much difference in MPGs...of your truck...
and remember the air coming off the back of your truck with the tailgate up actually forms a vacuum in that area.
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Randal
post Apr 10 2010, 08:48 AM
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QUOTE(DanT @ Apr 9 2010, 09:36 PM) *

Randal, your tires on your tire rack give you more drag than the car does...IMHO
Once you move the air over the tires it should continue right over the car.
Other than keeping rocks and debris off the front of your car, I doubt you will see much difference in MPGs...of your truck...
and remember the air coming off the back of your truck with the tailgate up actually forms a vacuum in that area.




I wonder how much the vacuum is reduced given that I have a complete cover over the bed of my truck?
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DanT
post Apr 10 2010, 09:21 AM
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the cover just keeps the wind out of the box. You still have two areas that create vacuum. the back of the actual cab, and then the back of the box at the tail gate.
your car sits so low and the tire rack is even pretty low...so I am not sure there will be a huge difference, but you will definitely keep some debris off the front of 222.
I am probably completely wrong (IMG:style_emoticons/default/biggrin.gif)
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URY914
post Apr 10 2010, 04:48 PM
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It gives the rig a clean look. That's what counts.
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blabla914
post Jun 17 2010, 11:10 AM
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Thinking about what you said brought up an interesting idea. What makes the white fog like they use in wind tunnels to view air flow?


Have somebody video your rig driving in a light rain or just a wet road. The spray will show you a lot. Cheap and easy to do, but difficult to get the timing down. You have to have your rig all set to go and somebody lined up to video when it's raining. Naturally it can't be raining too hard as the rain will obscure what the spray is doing.

I see a consistent 1-2 mpg gain on my crew cab gas chevy using a tonneau cover when I'm not pulling a trailer. I'm not sure it has the same effect dragging the trailer. I just haven't done enough driving with/without tonneau and the trailer. That said I have to agree, even your tires aren't that high relative to the top of the tail gate

In the end, I have to agree....Most of the benefit will be keeping the crud off your car.

Kelly
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