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> Air Deflector, For my trailer
Randal
post Feb 27 2010, 12:28 PM
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I just bought an air deflector that is 64" by 34" and will be bolting it to my trailer in front of the tire rack. You've seen these deflectors on big diesel trucks, kind of looks like a big snow board.

I might have to move the tire rack back 6 inches to get the rake I want, but here is my question?

Is it better to mount it low or high?

I can mount it on the trailer A frame, directly behind the triangle aluminum box, but I'd have to move the tire rack back at least 6".

I can mount it next to the back lip (cover) of the aluminum box but will still have to move the tire rack.

In any event, where will I get the best air flow to help mileage?

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Randal
post Feb 27 2010, 02:59 PM
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Here is a picture of the (dirty) deflector. This is the angle I think will work, but I'll need to move the tire rack back 6".

Right height?

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Randal
post Feb 27 2010, 03:00 PM
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One more picture:

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koozy
post Feb 27 2010, 04:31 PM
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I think it will work just fine. Is it fiberglass or aluminum?
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Randal
post Feb 27 2010, 04:37 PM
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QUOTE(koozy @ Feb 27 2010, 02:31 PM) *

I think it will work just fine. Is it fiberglass or aluminum?



Fiberglass. It will look good when repainted. Structurally perfect

One can only guess how many miles it has seen.
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URY914
post Feb 27 2010, 04:43 PM
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Looks cool and should work well.
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URY914
post Feb 27 2010, 04:46 PM
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Higher would be better as it will smooth out the air over the top of the car.
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Randal
post Feb 28 2010, 12:08 PM
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QUOTE(URY914 @ Feb 27 2010, 02:46 PM) *

Higher would be better as it will smooth out the air over the top of the car.




I'll mount it high as you suggested and also leaning back as in the picture. Think moving the tire rack back 6 inches would be just about right. Of course I'd still have to figure out where to put the tank. Maybe weld the rings to the front cross bar of the trailer. Yea, that might work, but it would be hell to get the (heavy and awkward) tank into the rings without any real flat surfaces except the top 2" of the cross bar.

Or I could get rid of the trailer box, which would be the easiest of all solutions.

Or i could mount the deflector right where it is shown in the picture, then use removable pins on the bottom so I can just lift it out of the way when I need to get into the box.
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URY914
post Feb 28 2010, 01:22 PM
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Maybe you could somehow hinge the deflector to flip it up for access to the box. Removing it each time doesn't sound like much work now but it will soon become a PITA when you need to get it the box for one little thing.
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Randal
post Feb 28 2010, 01:42 PM
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QUOTE(URY914 @ Feb 28 2010, 11:22 AM) *

Maybe you could somehow hinge the deflector to flip it up for access to the box. Removing it each time doesn't sound like much work now but it will soon become a PITA when you need to get it the box for one little thing.




I think that idea might work, the question being how high it will lift before hitting the tires.

The cool thing about the deflector is the attachment points. That together with the U channel (previously attached to the top of the truck) which is drilled so you have any combination of angles to work with.

Here is the back side of the deflector.

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koozy
post Feb 28 2010, 02:28 PM
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Ah, I think I got it... Make it so the thing is hinged at the top. It goes over the edge of the box when in driving position and when you need something in the box, the bottom drops so the deflector is vertical.
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koozy
post Feb 28 2010, 02:29 PM
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Then it doesn't hinder tire removal either
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Randal
post Feb 28 2010, 03:07 PM
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QUOTE(koozy @ Feb 28 2010, 12:28 PM) *

Ah, I think I got it... Make it so the thing is hinged at the top. It goes over the edge of the box when in driving position and when you need something in the box, the bottom drops so the deflector is vertical.



Given the rake I want, i.e., the picture with the AD over the box, not behind it, I think the AD will lift up when the pin is removed. My only question is whether it will lift enough to open and get stuff out of the aluminum box.

It will be easy to figure it out when I can get back to the trailer again.

Here is a picture. Imagine all the red bars as being behind the deflector.

Here's to good mileage. (IMG:style_emoticons/default/drunk.gif)

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URY914
post Feb 28 2010, 04:37 PM
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Happy motoring!
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Randal
post Mar 1 2010, 02:16 PM
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QUOTE(URY914 @ Feb 28 2010, 02:37 PM) *

Happy motoring!



I went back and looked at the air deflector again today. Installation is going to be easy.

I just have to bolt the U channel to the front uprights on the tire rack.

Then move the four attachment points on the air deflector out about two inches

The top attachment points will then bolt right into the top hole of the U channel, the bottom will be attached using existing L channel.

The bottom attachment will be easily accessible, so with a 1/2 pin and keeper, that can be pulled out, the air deflector will go up about 15 inches allowing the lid on the aluminum box to open.
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URY914
post Mar 1 2010, 02:32 PM
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Don't you love it when a plan comes together.
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Randal
post Mar 1 2010, 02:36 PM
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QUOTE(URY914 @ Mar 1 2010, 12:32 PM) *

Don't you love it when a plan comes together.



Yea. Can't wait to test the mileage.
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grantsfo
post Mar 1 2010, 11:43 PM
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My trailering MPG went up when I put shell on my truck.
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camaroz1985
post Mar 2 2010, 07:42 AM
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Also will help keep those little stones and stuff from being kicked up onto your car, though I guess you had the tires there before.
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Chris Pincetich
post Mar 2 2010, 10:53 AM
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Does this mean we will see Randal and 222 at a GGR AX this year? (IMG:style_emoticons/default/beerchug.gif)
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