Reply
 
Thread Tools Search this Thread Display Modes
 
Old 04-29-2007, 08:40 AM   #1
Rivet Master
 
Lumatic's Avatar

 
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia , New Mexico
Join Date: Feb 2005
Posts: 6,642
Images: 16
Blog Entries: 1
Gas vs. trailer vs. tow vehicle

I tow my 73 Sovereign 5200# with my F250 Superduty with a Triton engine and get 13mph. I am working on restoring a 71 Trade Wind #4200. I have not yet got it on the road. I wonder if I might squeeze out an extra mile or 2 per gallon, or find a more gas econconomical tow vehicle, maybe a 6?

I also wonder about the relation between wind resistance and weight as ASs have about the same profile. A Bambi or Caravel or other small coach is too small for me but maybe a Globe Trotter would save some gas.

Thinking in the other direction would I see a big drop in gas mileage towing a big 34 footer?
__________________

__________________
Sail on silver girl. Sail on by. Your time has come to shine.
Lumatic is offline   Reply With Quote
Old 04-29-2007, 08:53 AM   #2
Rivet Monster
 
wahoonc's Avatar

 
1975 31' Sovereign
1980 31' Excella II
Sprung Leak , North Carolina
Join Date: Jun 2003
Posts: 7,174
Images: 40
Quote:
Originally Posted by Marshall
I tow my 73 Sovereign 5200# with my F250 Superduty with a Triton engine and get 13mph. I am working on restoring a 71 Trade Wind #4200. I have not yet got it on the road. I wonder if I might squeeze out an extra mile or 2 per gallon, or find a more gas econconomical tow vehicle, maybe a 6?

I also wonder about the relation between wind resistance and weight as ASs have about the same profile. A Bambi or Caravel or other small coach is too small for me but maybe a Globe Trotter would save some gas.

Thinking in the other direction would I see a big drop in gas mileage towing a big 34 footer?
Marshal,
I don't think that the mileage is outrageous for the combination. FWIW I get about the same towing my 75 Sovereign with my F150 4.6 V-8 on flat ground. I get about 14.5mpg with my 96 F350 PSD. (It only gets 15mpg under normal conditions.)
Unless you are doing a bunch of start and stop driving the overall weight is going to be a small part of your mileage hit, the biggest is going to be the aerodynamics of it, and Airstreams excel at that.

Aaron
__________________

__________________
....so many Airstreams....so little time...
WBCCI #XXXX AIR #2495
Why are we in this basket...and where are we going
wahoonc is offline   Reply With Quote
Old 04-29-2007, 10:33 AM   #3
Moderator
 
Stefrobrts's Avatar

 
1968 17' Caravel
Battle Ground , Washington
Join Date: Dec 2002
Posts: 11,906
Images: 50
Blog Entries: 1
What kind of milage does your F250 Superduty get when not towing? Like Aaron says, we have found there is hardly any difference between towing and not towing on the milage of our E150. Both numbers are pretty bad
__________________
Stephanie




Stefrobrts is offline   Reply With Quote
Old 04-29-2007, 11:00 AM   #4
Rivet Master
 
Lumatic's Avatar

 
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia , New Mexico
Join Date: Feb 2005
Posts: 6,642
Images: 16
Blog Entries: 1
Quote:
Originally Posted by Stefrobrts
What kind of milage does your F250 Superduty get when not towing? Like Aaron says, we have found there is hardly any difference between towing and not towing on the milage of our E150. Both numbers are pretty bad
Only figured out non towing mileage once, about 15mpg. So if there is a savings towing the Trade Wind which is 1000# lighter it wont be much. However, I assume another tow vehicle with a smaller engine would have a substantial difference.

I also wonder if I really need the F250 When pulling my Sovereign. It pulls great but I can definitely feel the tow on a good hill.
__________________
Sail on silver girl. Sail on by. Your time has come to shine.
Lumatic is offline   Reply With Quote
Old 04-29-2007, 11:00 AM   #5
More than one rivet loose
 
thecatsandi's Avatar

 
Currently Looking...
Keymar , Maryland
Join Date: Feb 2006
Posts: 3,754
My 04 F-250 5.4L Gas Long Bed, 4X4 towing 31 Classic 10 MPG average
My 06 F-250 6.0L Diesel Long Bed Extended cab 4X4 towing 31 Classic 14 MPG average
__________________
Michelle TAC MT-0
Sarah, Snowball

Looking for a 1962 Flying Cloud

thecatsandi is offline   Reply With Quote
Old 04-29-2007, 11:12 AM   #6
Tom, the Uber Disney Fan
 
Minnie's Mate's Avatar
 
2006 30' Safari
Orlando , Florida
Join Date: Aug 2004
Posts: 4,693
Images: 7
Personally, I don't think 1-2 MPG's is worth investing in another vehicle unless it is time to make a trade anyway. It would take a lot of towing to pay for the difference in trade or insurance alone on a second tow vehicle if you are considering two tow vehicles.
__________________
2006 30' Safari - "Changes in Latitudes"
2008 F-250 Lariat Power Stroke Diesel Crew Cab SWB
Family of Disney Fanatics
WBCCI# 4821
http://streaminacrossamerica.com/
Minnie's Mate is offline   Reply With Quote
Old 04-29-2007, 11:41 AM   #7
More than one rivet loose
 
thecatsandi's Avatar

 
Currently Looking...
Keymar , Maryland
Join Date: Feb 2006
Posts: 3,754
4 MPG does not seem like a lot but it is significant. 40% savings in fuel comsumption. Here in eastern Oregon Diesel is the cheapest fuel by 15c/Gallon.
__________________
Michelle TAC MT-0
Sarah, Snowball

Looking for a 1962 Flying Cloud

thecatsandi is offline   Reply With Quote
Old 04-29-2007, 11:55 AM   #8
Rivet Master
 
2007 25' Safari FB SE
Suburbia , Sunny So Cal
Join Date: Jun 2006
Posts: 3,756
Your current mileage is pretty good. If you go with a smaller engine it will work harder to do what your current engine does. Don't know if you'll gain anything.

If you are otherwise happy with your current truck you'll save a ton of money by doing nothing.
__________________
I'd rather be boon docking in the desert.

WBCCI 6731 FCU
AIR# 13896
CA 4
Goin camping is offline   Reply With Quote
Old 04-29-2007, 01:57 PM   #9
Well Preserved

 
1993 21' Sovereign
Colfax , North Carolina
Join Date: Jun 2003
Posts: 20,190
You'll spend the fuel savings in increased repairs, because you will be working the smaller engine harder. If you really want better mileage, go with a diesel. But, you will spend your fuel savings on the higher initial cost of the diesel.
__________________
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
Terry
overlander63 is offline   Reply With Quote
Old 04-29-2007, 05:26 PM   #10
Naysayer
 
Boondocker's Avatar

 
1968 24' Tradewind
Louisville , earth
Join Date: Jun 2005
Posts: 4,635
Images: 7
Send a message via Yahoo to Boondocker
Three ways to improve mileage

1. Inflate tires to the proper pressure.
2. Make sure you are tuned up, including air filter.
3. Drive 55-60. The major issue with towning and milage is wind resistance. Remember that above 55, the resistance increases out of porportion to increased speed.
__________________
Rodney

Visit my photography page
and the
Favorite camp grounds project map
My Blog

(The artist formerly known as General Disarray)

Boondocker is offline   Reply With Quote
Old 04-29-2007, 06:20 PM   #11
4 Rivet Member
 
bobkelly's Avatar
 
2003 22' International CCD
Whittier, California , Depoe Bay, Oregon
Join Date: Sep 2006
Posts: 358
Marshall----You've got the right tow vehicle for the two trailers. The biggest variable under your control for mpg is mph.
__________________
Bob

2003 22ft CCD Int'l
2005 GMC Yukon Denali
WBCCI #2960
bobkelly is offline   Reply With Quote
Old 04-29-2007, 06:47 PM   #12
Rivet Master
 
JimGolden's Avatar
 
Vintage Kin Owner
1977 31' Excella 500
Berkeley Springs , West Virginia
Join Date: Sep 2005
Posts: 1,619
Images: 7
You'll see a big difference in mileage between them in the mountains; probably won't see much at all on the level ground.

Speed is a big deal toward mileage. I posted some math on the $4/gallon thread talking about it. But to summarize: double the speed and you need eight times the horsepower. Or, to go from 60mph to 70mph, the aerodynamic drag goes up almost 40% and the horsepower required goes up 58%. So if you could pull your trailer at 60mph on 125hp, you'll need 200hp to pull it 70mph. Power is directly related to fuel burn, so you'll burn 58% more gas to go 70 than 60.

I hate driving slow, but it makes a big difference in fuel mileage. Besides, if we're in that big a hurry, what's the point of the vacation. Gots to slow down and smell the roses
__________________
- Jim
JimGolden is offline   Reply With Quote
Old 04-29-2007, 06:52 PM   #13
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,279
Get A Sprinter

and get 14-17 mpg while TOWING a 4500# Airstream ('06 19CCD) at Interstate speeds. And that's with a full load in the van (another 2500# of payload).

20-22mpg without the trailer .
__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Old 04-29-2007, 10:23 PM   #14
Rivet Master
 
1977 31' Sovereign
1963 26' Overlander
1989 34' Excella
Johnsburg , Illinois
Join Date: Jul 2005
Posts: 2,941
Living good is not about how much money you can save by compromising your truck/trailer so that you can just get by. It is doubtfull you will save much real dollars per year when just traveling less than 25,000 miles per year. The depreciation on the new truck will eat up all the savings. The same can be said of the diesel with higher initial cost and higher tune up and maintenance fees, unless you are putting on big miles per year.
__________________

__________________
dwightdi 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
gas valves gmlcjb LP Gas, Piping, Tanks & Regulators 5 07-17-2006 10:31 AM
Oven gas line broken lbrodsky LP Gas, Piping, Tanks & Regulators 4 07-23-2002 04:52 AM
Squirrel Eating Gas Lines! lbrodsky LP Gas, Piping, Tanks & Regulators 8 07-06-2002 11:03 AM
Poor cooling on AC, good on gas Pahaska Furnaces, Heaters, Fireplaces & Air Conditioning 1 06-13-2002 11:46 PM
Small gas gen sets FrankR Electrical - Systems, Generators, Batteries & Solar 0 04-12-2002 03:37 AM


Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 12:08 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.