Reply
 
Thread Tools Search this Thread Display Modes
 
Old 04-03-2012, 10:17 AM   #1
1 Rivet Member
 
Currently Looking...
castle rock , Washington
Join Date: Jul 2011
Posts: 12
Roof attachment increases MPG

The quote below indicates great increase in MPG. Has anyone used such with an AS? What were the results? This fella used it with a rectangular shaped trailer.


Quote:
Originally Posted by TRfour View Post
I had great increase in fuel mileage with an roof mounted air deflector when we pulled a 28 footer up to Nova Scotia and back, sometimes twice a summer for vacation. It paid for itself in fuel savings on one round trip, ball park, 1800 miles!

Side note; Here in Texas, the April bugs are out! They call them June bugs up north! ... Well, don't ya know that this deflector also keeps them critters and others from embedding themselves all over the front of your trailer! Much less elbow grease, used to clean!

Attached Images
__________________

__________________
billy1 is offline   Reply With Quote
Old 04-03-2012, 10:20 AM   #2
moderator
Commercial Member
 
Airslide's Avatar

 
2014 23' FB International
Currently Looking...
Wilton , California
Join Date: Aug 2008
Posts: 1,705
Images: 50
Send a message via Yahoo to Airslide
Hello Billy1,

I like that wing. What brand is it?

Thanks Vinnie
__________________

__________________
"Old fashioned service on your late model Airstream"

https://www.facebook.com/VinniesNort...ir?ref=tn_tnmn
Airslide is offline   Reply With Quote
Old 04-03-2012, 10:37 AM   #3
Rivet Master
 
RickDavis's Avatar

 
1961 24' Tradewind
1969 29' Ambassador
1970 21' Globetrotter
Jamestown , Tennessee
Join Date: Jul 2008
Posts: 1,781
Many years ago I built one and could tell no significant difference with my 29 foot Airstream. Of course I also had a cab high cap on the truck.

Keep in mind this guy is pulling a fifth wheel, Not only big and square but A lot of resistance when the air flows around the truck cab and goes below the bedroom area that is over the truck and hits all of the lower front.

I have delivered fifth wheel in Texas in june bug season and when you go to the car wash brown water runs off the trailer as you dissolve them.

Any device like this is going to have to make a significant improvement in fuel mileage to pay back the original cost
__________________
Rick Davis 1602 K8DOC
61 tradewind, plus a few others
13 Ram 2500 TD
99 Dodge TD 577K miles

RickDavis is offline   Reply With Quote
Old 04-03-2012, 10:41 AM   #4
1 Rivet Member
 
Currently Looking...
castle rock , Washington
Join Date: Jul 2011
Posts: 12
I do not know anything about it including the brand. I only know what I quoted...it is not mine.
__________________
billy1 is offline   Reply With Quote
Old 04-03-2012, 10:51 AM   #5
Rivet Master
 
JFScheck's Avatar
 
Vintage Kin Owner
Rockville , Maryland
Join Date: Mar 2010
Posts: 1,474
Images: 33
I think my cap in the back and the height of my truck would make such an attempt at aerodynamics not worth the time, in fact - such a wing if you don't know what your doing can actually mess up air flow and provide worse mileage!

Air flow dynamics is very, very complicated...
__________________
John "JFScheck" Scheck
2015 Roadtrek CS Adventurous XL
2015 Mercedes Sprinter 3500 XL Chassis with Mercedes BlueTec V6 Diesel
**I Love U.S.A.**
JFScheck is offline   Reply With Quote
Old 04-03-2012, 11:06 AM   #6
moderator
Commercial Member
 
Airslide's Avatar

 
2014 23' FB International
Currently Looking...
Wilton , California
Join Date: Aug 2008
Posts: 1,705
Images: 50
Send a message via Yahoo to Airslide
It was suggested that in my situation I get a nose cone for the box but wouldn't be opposed to a wing.
Attached Images
 
__________________
"Old fashioned service on your late model Airstream"

https://www.facebook.com/VinniesNort...ir?ref=tn_tnmn
Airslide is offline   Reply With Quote
Old 04-03-2012, 11:10 AM   #7
Rivet Master
 
Gene's Avatar
 
2008 25' Safari FB SE
Grand Junction , Colorado
Join Date: Sep 2007
Posts: 10,840
Quote:
Originally Posted by JFScheck View Post
Air flow dynamics is very, very complicated...
I think the deflector would just complicate air flow because of the space under it and the distance to the trailer. The long distance between it and the trailer would cause all sorts of turbulence, maybe more than a pick up without it. I have seen a few of these on the road, but never had a chance to ask anyone with it what changes they saw in gas mileage.

It is said a tonneau (which we have) or a well fitted cap on the pick up should improve air flow and mileage, but the space between the back of the truck and the front of the trailer probably causes all sorts of drag that is nearly impossible to eliminate. Maybe a deflector could be mounted at the back of the pick up, but it would have to be as high as the trailer. It would be heavy, obstruct rear view and be difficult to attach. The ugliness of it would probably attract few buyers.

If the trailer were mounted on a fifth wheel like on over the road, large truck, a deflector would direct air over the top of the trailer. That makes sense, but in that case the trailer is very close to the back of the truck cab.

Gene
__________________
Gene is offline   Reply With Quote
Old 04-03-2012, 11:22 AM   #8
Rivet Master
 
noreen&sal's Avatar
 
1981 27' Excella II
mays landing , South Jersey
Join Date: Nov 2009
Posts: 1,179
Images: 9
OMHO, but the "nose" of an AS is its own deflector. Sal.
__________________
Sal & Nora
Let us live so that when we die even the undertaker will be sorry. Mark Twain
AIR 42483
TAC N.J. 17
WBCCI 24740
noreen&sal is offline   Reply With Quote
Old 04-03-2012, 10:46 PM   #9
La Casita
 
Dan and Liz's Avatar
 
1987 25' Sovereign
Fort Collins , Colorado
Join Date: Feb 2011
Posts: 261
We had one. It might work with a square SOB or 5th wheel, but the only difference I saw towing about 7,000 miles with the Airstream was that it lightened my wallet by about $350. I sold it.
__________________
Dan & Liz H

"I'd rather be happy for just one day than miserable for the rest of my life."
Dan and Liz is offline   Reply With Quote
Old 04-05-2012, 12:27 AM   #10
Rivet Master
 
JFScheck's Avatar
 
Vintage Kin Owner
Rockville , Maryland
Join Date: Mar 2010
Posts: 1,474
Images: 33
Sweet!
__________________
John "JFScheck" Scheck
2015 Roadtrek CS Adventurous XL
2015 Mercedes Sprinter 3500 XL Chassis with Mercedes BlueTec V6 Diesel
**I Love U.S.A.**
JFScheck is offline   Reply With Quote
Old 04-05-2012, 06:10 AM   #11
CLOUDSPLITTER "Tahawas"
 
ROBERT CROSS's Avatar

 
2003 25' Classic
Zanadude Nebula , WNY
Join Date: Jun 2007
Posts: 11,153
Images: 1
Thumbs up

My roof deflector...yes it does help mpg and keeps the bug's off.

Bob
Attached Thumbnails
Click image for larger version

Name:	piseco_20lake_20camping_20july_202008_20009.jpg
Views:	67
Size:	102.9 KB
ID:	155063  
__________________
PFC.....

“After all these years the reason I continue to love Thanksgiving.....I still sit at the kids table.”
RLC

Sandra wanted to go to Cleveland on vacation,
but I’m the Husband, so we went to Cleveland.
RLC
ROBERT CROSS is offline   Reply With Quote
Old 04-05-2012, 06:15 AM   #12
Rivet Master
 
Skater's Avatar
 
1995 30' Excella
Bowie , Maryland
Join Date: Apr 2005
Posts: 2,344
Quote:
Originally Posted by Dan and Liz View Post
We had one. It might work with a square SOB or 5th wheel, but the only difference I saw towing about 7,000 miles with the Airstream was that it lightened my wallet by about $350. I sold it.
I'm not surprised, but I'm glad to hear this. I thought that was part of the reason Airstreams were better to tow - the round shape helped wind flow more smoothly over them.
__________________
1995 Airstream Classic 30' Excella 1000
2014 Ram 2500 Crew Cab with Cummins 6.7L Diesel

Sold but not forgotten: 1991 Airstream B190
Sold: 2006 F-250 6.0L Powerstroke Supercab
Skater is offline   Reply With Quote
Old 04-05-2012, 09:04 AM   #13
Rivet Master
 
SteveH's Avatar
 
2005 39' Land Yacht 390 XL 396
Common Sense , Texas
Join Date: Sep 2007
Posts: 5,311
It has been my expereince the worst wind is what I call a quartering head wind, coming from either 10 o'clock, or 2 o'clock off direct head wind, and I think that is because the wind can actually get between the tow vehicle and trailer and cause a good amount of drag. A direct head wind is not near as bad, in my experence.

The above deflector would do absolutely nothing to improve conditions in a quartering wind, IMHO.
__________________
SteveH is offline   Reply With Quote
Old 04-05-2012, 09:11 AM   #14
Rivet Master
 
Minno's Avatar

 
1972 31' Sovereign
Lexington , Minnesota
Join Date: Feb 2009
Posts: 3,323
Quote:
Originally Posted by ROBERT CROSS View Post
My roof deflector...yes it does help mpg and keeps the bug's off.

Bob
Bob, do you drive with the tailgate open too!

Chris
__________________

__________________
Minno is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Awning with Screen/Tent attachment SlvrParachut Community Polls 14 08-08-2014 10:41 PM
Classic vinyl/leather white roof ck21084 Upholstery, Blinds, Walls & Interior Finishes 5 05-27-2012 08:15 AM
Getting on the roof perryg114 Roof 34 04-05-2012 07:07 PM
2012 Airstream Mercedes Diesel B Van 20+MPG eBay Watch Airstreams on eBay 0 04-01-2012 08:20 AM
Roof Vent repair litlgeezer Roof Vents, Skylights & Fans 22 03-31-2012 06:36 AM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 04:33 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.