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Open Roads Forum  >  Fifth-Wheels

 > RV wind deflectors do they work we will see

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TXiceman

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Posted: 08/02/22 07:28am Link  |  Quote  |  Print  |  Notify Moderator

JRscooby wrote:

TXiceman wrote:

It will definitely keep the bugs from getting so thick on the trailer or at least move the bug line up.


False. If it is too far from the front of trailer it might pull bugs pushed out by windshield back in.


False.... It did not cover the whole front of the trailer. This was on an SUV and I mounted the deflector toward the rear of the SUV. The deflector was covered in bugs and the upper foot of the RV had bugs. On a pickup what you said might be true.

Ken


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2013 HitchHiker 38RLRSB Champagne, toted with a 2012, F350, 6.7L PSD, Crewcab, dually. 3.73 axle, Full Time RVer.
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StirCrazy

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Posted: 08/02/22 07:50am Link  |  Quote  |  Print  |  Notify Moderator

cj99 wrote:

So I have a 40 ft forest river - river ranch 5th wheel , very tall and I get 7 MPG i have a 2012 F350 with 6.7 diesel and 373 gears, one reason for the low MPG might be 3.73 gear are kind of a hwy gear not like 410 etc.
All I can say is empty no trailer I get 12-15 ( and never gotton over 17 and that was only on one trip empty ) on a good day. And with the trailer I get 7 MPG
Yes you dont see them as much anymore but then again diesel was in the 3$ range a year ago, so i would not even think about it then. and yes it has dropped ( a little) I am in Harrisburg PA and diesel is still 5.50 a gallon .
I dont drive fast with the trailer attached 65-70 tops
also mine is 4x4 crew cab long bed DRW, I had a short bed 6.0 diesel SRW before that got 18 empty and 12 loaded


wow I have a 40 foot 5th also and the worst I have ever got was 8.3mpg driving into a headwind up a hill at 70mph. normaly I drive 55 to 60 mph and I get 12.5 mpg US . I have a 2014 F350 with the 6 speed auto, 3.55 ratio with SRW and empty highway I get 20mpg or better. I wonder if the difference is the extra tires and the steeper rear end ratio?


2014 F350 6.7 Platinum
2016 Cougar 330RBK
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tomman58

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Posted: 08/02/22 08:19am Link  |  Quote  |  Print  |  Notify Moderator

Most trailers today that are in the 30+ footage and are not 5ers are sloped in the front and do well with head winds and winds in general. As for mileage going west always has less mpgs most always a headwind. Fro checking mpg do it going east for a feel good moment.


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cj99

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Posted: 08/02/22 09:06am Link  |  Quote  |  Print  |  Notify Moderator

tomman58 wrote:

Most trailers today that are in the 30+ footage and are not 5ers are sloped in the front and do well with head winds and winds in general. As for mileage going west always has less mpgs most always a headwind. Fro checking mpg do it going east for a feel good moment.


Well not me I just drove that truck from Arizona, to Colorado then to Pennsylvania empty and my average was 15.7 no RV
Now mine is a DRW , but I use to have a 6.0 SRW that got 18 mpg empty I don't drive over 79 much





cj99

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Posted: 08/02/22 09:07am Link  |  Quote  |  Print  |  Notify Moderator

I mean I don't drive over 70 much... I fat fingers that last one

JRscooby

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Posted: 08/02/22 09:23am Link  |  Quote  |  Print  |  Notify Moderator

TXiceman wrote:

JRscooby wrote:

TXiceman wrote:

It will definitely keep the bugs from getting so thick on the trailer or at least move the bug line up.


False. If it is too far from the front of trailer it might pull bugs pushed out by windshield back in.


False.... It did not cover the whole front of the trailer. This was on an SUV and I mounted the deflector toward the rear of the SUV. The deflector was covered in bugs and the upper foot of the RV had bugs. On a pickup what you said might be true.

Ken


When you use the term "definitely" because it happened in your case, the argument gets pretty weak. Then "on a pickup..." proves your first statement can't be true

I can't say I have much to do with RVs, but have worked with guys that run defectors and different height sleepers and trailers for a lot of miles. And some personal experience; Friend had me run his Volvo for a few weeks after he had a car accident. I worked it just like old Pete, suck it up for scales then stretch it out for the ride. After few thousand miles, got back to his house. He looked at rig before his kids started wash, asked about bugs on reefer. Next week, I left it shortened up, fewer bugs.
Another trip, Pete all stretched out. Bird just missed windshield, hand behind asked if glass broke. He saw feathers when bird hit front of end dump.

TravelinDog

Nevada

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Posted: 08/02/22 01:40pm Link  |  Quote  |  Print  |  Notify Moderator

Let us know how that air deflector works. I'm guessing it will do little to nothing.
If it slopes at a 45° angle it will make the air flow past the front of the 5er but it will also exert a downforce which is the equivalent of pulling more weight.


Just say no to the payload police ">

cj99

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Posted: 08/02/22 04:51pm Link  |  Quote  |  Print  |  Notify Moderator

Yep, good discussion here, it will be a few weeks but ill do a fair of a test with it up and with it stowed away, also note on bugs o. 5th wheel . I'll take pictures of mpg lie o meter and speeds. I may even do some video
After towing my 5th well I gotta run back to Arizona from Colorado and get my 24ft enclosed car hauler. Will test that too, but being its hooked to the back of the truck I dought ot will do anything at all.

cj99

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Posted: 08/02/22 04:54pm Link  |  Quote  |  Print  |  Notify Moderator

Then after that run I have to goto arizona again and get my 22ft goose neck flatbed that has my wife's toyota fj on it, so ill see if I can deflect the bug over the fj. For the two regular trailers I'm going to be pulling I may put the deflector a very back of my truck on a special Mount that will keep it bed height but at the very tailgate to allow it to be close to the trailers

StirCrazy

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Posted: 08/03/22 06:27am Link  |  Quote  |  Print  |  Notify Moderator

they stopped using the deflectors on rigs because they didnt work when they actualy started testing things for fuel milage increases. I suspect they would be even worse in a pick up as they would be even farther away from the nose of the trailer and might even hurt milage by adding another negitive pressure zone and more frontal area. the best thing you can do is get that nose of the 5th as close to the cab as possible to minimize the drag behind the cab. for example I got over 1 mpg better using my 1999 f250 diesel shortbox with my 5th than I do with my 2014 f350 long box. but theres also almost 2 feet difference in where the 5th cab sits in relation to the cab.

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