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do roof window deflectors really work?

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Old May 9, 2014 | 09:14 AM
  #1  
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do roof window deflectors really work?

I've read mixed reviews,

what's funny is searching for roof wings, aero shields, etc..

I can't hardly find any for sale on line

I must be using wrong keywords
 
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Old May 9, 2014 | 09:20 AM
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Sunroof wind deflector?
 
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Old May 9, 2014 | 09:23 AM
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Are you talking about vent shades?

I used to have to use those down here so I could keep the window open a slightly without letting rain in. I had the back window blow OUT of a 2-door hatchback because it got too hot and the pressure had to release somewhere... Our trucks have vents in the back to prevent this... Had the window not just shattered in place I never would have believe it. (and it was protruding OUTWARD from the vehicle).

The hood deflectors are hit and miss. They help but are not 100%. I've run them and still had a rock hit the hood - but I have also seen many a rock hit them and bounce over the vehicle and into the persons windshield behind me.

I kinda don't know what you mean by roof wings or aero shield... So this is best I can do at the moment.
 
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Old May 9, 2014 | 09:48 AM
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Beef cake. The roof mount air deflectors like on a big rig? If so its a waste of money. The trailer would have to be very close to it. Or the air will foil right back down with no help at all. Actually its a hinderence, you have more air drag on the deflector.
 
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Old May 9, 2014 | 10:00 AM
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and with your big GN trailer, only a very small area is at issue.

I find it interesting that the big trucks are now using tailgate mounted deflectors to reduce the vacuum drag.
 
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Old May 9, 2014 | 10:15 AM
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I'm talking about on top of the truck to help deflect wind from the trailer

 
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Old May 9, 2014 | 10:16 AM
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these things

 
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Old May 9, 2014 | 10:17 AM
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Originally Posted by sdetweil
and with your big GN trailer, only a very small area is at issue.

I find it interesting that the big trucks are now using tailgate mounted deflectors to reduce the vacuum drag.
That is the reasons for the extra wide tailgate top on the Dodges. Apparently it allows the truck to get .01 MPG more. And I see people complaining that if you have a trailer hooked up and drop the tailgate it smacks into the trailer arms. (of course this assumes a bumper pull trailer)

Beefcake: Sorry I have no experience with those. Thanks for the clarification though!
 
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Old May 9, 2014 | 10:22 AM
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Total waste of money as I stated earlier. You would need it very high as wide as trailer. And side curtains to do any good at all.
As Sam said. The back of trailer reducing vacuum is what needs disrupted.

As long as your trailer is the trailer bottom curtains would probably be a wiser thing to do.
 
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Old May 9, 2014 | 10:39 AM
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Beef. Here is something that you may find interesting

Ck out. Air tabs.com and browse around.
 
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Old May 9, 2014 | 10:51 AM
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Originally Posted by beefcake
I'm talking about on top of the truck to help deflect wind from the trailer

 
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Old May 9, 2014 | 01:10 PM
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I know, I can't believe how short of a trailer he tows as well...

Looks like 60 feet+ and that is PAST the back of the truck.
 
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Old May 9, 2014 | 01:32 PM
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Add Truck and trailer wow. I bet DOT keeps a eyeball on that monster.lol
 
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Old May 9, 2014 | 01:43 PM
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Originally Posted by Hdslider
Add Truck and trailer wow. I bet EVERYONE keeps a eyeball on that monster.lol
Fixed that for you Paul
 
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Old May 9, 2014 | 02:01 PM
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I wouldn't worry about no deflector for that little trailer...
 
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