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08-03-2015, 03:49 PM
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#1
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Rivet Master
1979 31' Sovereign
Northeastern
, Kentucky
Join Date: Feb 2011
Posts: 627
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Travel with a full load of water?
I've read that traveling with a tank full of water helps with the center of gravity with the trailer. I'm curious if it really makes a difference, since a 50 gallon tank of water weighs more than 400lbs. That seems like a lot of extra weight if the effect isn't substantial.
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08-03-2015, 04:23 PM
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#2
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Rivet Master
1977 23' Safari
Niagara on the Lake
, Ontario
Join Date: Aug 2011
Posts: 984
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The tank I'm my safari is under the floor ahead of the axels so adding weight there adds stability and lowers the centre of gravity, in theory.
In practice I've towed with the tank full and empty and can't tell any difference in how the trailer tows.
Normally I fill the tank of we'll need water and leave it empty if we will have full hookups. So the tank will be full on the way to the NASCAR race but empty on the way for the KOA. I try not to tow with a half empty tank because the water sloshes around but I have and couldn't feel a difference. If we ever need to cross the desert I'll have a full tank in case of emergency.
__________________
1977 Safari Land Yacht
2005 Toyota Tundra SR5
2022 Toyota 4Runner SR5
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08-03-2015, 04:34 PM
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#3
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Figment of My Imagination
2012 Interstate Coach
From All Over
, More Than Anywhere Else
Join Date: Dec 2011
Posts: 10,868
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My 2¢ worth…
If you're on your way to a boondocking site, traveling with a full water tank makes sense. If you're bugging out for a hurricane, it makes sense. Otherwise, it's more of a problem than it's worth.
A low center of gravity only makes a difference if you're going to slalom the trailer on a test track. Sane drivers will never maneuver so sharply that having the CG a foot lower (or whatever) would have a measurable effect on handling. As long as all of your trailer wheels stay on the ground, it doesn't much matter how high or how low the CG is.
Carrying a full water tank cuts into your load capacity. It adds to your tongue weight (unless the whole tank is behind the axles, which is seldom the case). It places more of a load on the tank supports causing them to fail sooner, and contributes to separation of the tank's vent line.
Carrying a partial tank of water is even worse, because then you have a sloshing effect, which causes your CG to move as you're towing, and makes every above problem more of a problem.
So if you're going to a campground with water, haul with your tank empty. If you're going to a campground without water, haul with it full. But always make sure it's either full or empty, never anything in between.
__________________
I thought getting old would take longer!
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08-03-2015, 04:39 PM
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#4
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Rivet Master
Currently Looking...
Mission
, Texas
Join Date: Jun 2015
Posts: 836
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The GVWR of my 27' Overlander is 6,200 pounds, 400 pounds of water in the fresh water tank would be roughly 7% of the total weight - maybe some effect, but not likely.
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08-03-2015, 04:45 PM
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#5
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Rivet Master
2016 25' Flying Cloud
Venice
, Florida
Join Date: Apr 2015
Posts: 1,024
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I always carry enough for bathroom use only. If boon docking full tank!
__________________
Joe
Venice, FL
2016 FC 25RTB
TAC FL-47
2018 Nissan Titan XD Cummins Diesel
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08-03-2015, 05:01 PM
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#6
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Rivet Master
2014 31' Classic
2015 23' International
2013 25' FB International
Apache Junction
, Arizona
Join Date: Sep 2012
Posts: 6,223
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I look at the full water tank as it is better to have it and not need it than the not have it and need it scenario. When filled at home, we know what the water tastes like. If a mechanical issue happens and we are beside the road, there is water at hand for the toilet or to drink. Out West where we are based, there are long stretches of highways with literally no services of any kind.
The water issue would be less serious back East with exits so close together on the interstates.
__________________
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic w/ twin beds, 50 amp service, 1000 watt solar system, Centramatics, Tuson TPMS, 12" disc brakes, 16" tires & wheels
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08-03-2015, 05:02 PM
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#7
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2 Rivet Member
1974 31' Sovereign
Bend
, Oregon
Join Date: Sep 2009
Posts: 63
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I do the same Joe
derf
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08-03-2015, 06:00 PM
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#8
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4 Rivet Member
2016 27' Flying Cloud
Overland Park
, Kansas
Join Date: Mar 2013
Posts: 365
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Me too, full tank. Better to have and not need than to need and not have
Sent from my iPhone using Airstream Forums
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08-03-2015, 06:18 PM
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#9
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Rivet Master
2013 27' FB International
El Dorado Hills
, California
Join Date: Jan 2013
Posts: 2,023
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I often fill up full at home first. Most campsites I visit don't have a convenient spigot so am faced with hauling 6 or 7 6-gallon jugs of water to the trailer after arrival. This can cut into cocktail hour and gives me a sore arm and I get wet.
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08-03-2015, 06:22 PM
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#10
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Rivet Master
2002 30' Classic S/O
Garden Valley
, Idaho
Join Date: Jul 2010
Posts: 1,631
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Full tank for me when I leave home, even if I know I'm going to a full hookup park. Never know about the future. You can always pump & dump, but if you need water, it could be hard to find.
__________________
2008 F-250 4X4 Lariat V-10
2002 Airstream Classic 30' w/SO #2074
2007 Kubota 900 RTV
1996 Ford Bronco
2007 Lincoln LT
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08-03-2015, 06:26 PM
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#11
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3 Rivet Member
2015 16' Sport
Upper Sandusky
, Ohio
Join Date: Feb 2015
Posts: 205
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Our 16' Bambi definitely tows smoother and with less bounce with a full tank (only about 20 gallons). Also, I know that our home water supply is clean and odor-free. Not so sure about a campground's.
__________________
2015 Airstream Bambi Sport 16J
Past Travel Trailers:
*1992 Dutchmen 30' Bunk
*2003 Jayco Designer Series 32' Rear Living
*2015 T@B Sofitel S (exchanged after 3 days for Bambi)
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08-03-2015, 06:34 PM
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#12
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Rivet Master
2015 30' International
2009 27' FB International
2007 25' Safari
Currently Looking...
Greensboro
, North Carolina
Join Date: Aug 2008
Posts: 1,564
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Water
I usually carry all 54 gallons......as I am often boondocking for several days. This gives me at the least seven days without worry if I am careful.
The issue is not so much the fresh water but the gray tank which holds only 39 gallons...
__________________
Happy trails and Good Luck
Ms Tommie Fantine Lauer, Greensboro, NC
AIR #31871 KQ3H
www.fantinesvoice.com
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08-03-2015, 06:45 PM
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#13
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Rivet Master
2006 23' Safari SE
Biloxi
, Mississippi
Join Date: Nov 2011
Posts: 8,278
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Most times I head out I do not know where I might end up. Always nice to have plenty of water on board. I usually leave my tank full, drain and refill it once a month.
__________________
MICHAEL
Do you know what a learning experience is? A learning experience is one of those things that says "You know that thing that you just did? Don't do that."
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08-03-2015, 06:45 PM
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#14
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Rivet Master
1995 30' Excella
Bowie
, Maryland
Join Date: Apr 2005
Posts: 2,345
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I've towed with it empty, full, and plenty of places in between and have never noticed any kind of difference. You're talking about, at most, a couple hundred pounds difference compared to thousands of pounds, so the difference is relatively small, and the weight is over the axles so it doesn't affect the hitch.
As to whether I fill it, it depends. Going camping to a place without water hookups? Yes, fill it, obviously. Going camping in a place with a water hookup? Don't worry about filling. But I do keep some in it at all times during the season so that we have water to wash hands, etc. while on the road (probably a third or so). But it's not a decision to make sure I have X gallons in it - it's more of a situation of what's left after we used it for a weekend without hookups, until the next time we are camping without a water hookup.
__________________
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
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08-03-2015, 08:32 PM
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#15
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Rivet Master
1979 31' Sovereign
Northeastern
, Kentucky
Join Date: Feb 2011
Posts: 627
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Thanks for all the feedback. I really appreciate hearing about all the different experiences.
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08-03-2015, 09:25 PM
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#16
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Rivet Master
2007 27' Safari FB SE
NW Oregon in a nice spot
, Oregon
Join Date: Sep 2011
Posts: 879
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Lets make this fun. I tow my 27 Safari with a F250 diesel. I see no difference if the tank is full or empty. It just happily rides behind me regardless....and no real difference in fuel economy. So I run with a half to full tank,whatever might be there. Part of why I tow with this vehicle. That gives me lots of potty stops and plenty for coffee if I want. Then when I get home I turn the valve and let it make the ants who live under the trailer landing pad happy.
Okay, so I will admit that a full tank makes for a less "bumpy ride". So I really don't mind towing with a full tank and draining excess when I get home. But -I don't let the water sit at home so it doesn't get skunky and funky.
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08-04-2015, 03:22 AM
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#17
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Vintage Kin
Fort Worth
, Texas
Join Date: Nov 2006
Posts: 8,014
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Quote:
Originally Posted by KYAirstream
I've read that traveling with a tank full of water helps with the center of gravity with the trailer. I'm curious if it really makes a difference, since a 50 gallon tank of water weighs more than 400lbs. That seems like a lot of extra weight if the effect isn't substantial.
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The physics is simple enough. So is having fresh water at any time.
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08-04-2015, 06:07 AM
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#18
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Overland Adventurer
1991 34' Excella
2009 34' Panamerica
Telluride
, Colorado
Join Date: May 2012
Posts: 2,476
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I see all benefits of a full tank! We fulltime with 2 adults, 3 young kids and 2 dogs. For us that equals 5 full days of coffee, cooking, dish washing, peeing, showering, and watering the dogs. It's a no brainier, we can boondock and never worry about having to look for water. On day 5 we can service the trailer, and start the cycle all over again!
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08-04-2015, 07:08 AM
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#19
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Rivet Master
1988 25' Excella
1987 32' Excella
Knoxville
, Tennessee
Join Date: Oct 2010
Posts: 5,118
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Full to half full fresh water. Empty gray and black tanks if possible. Truck and trailer weigh 13000 to 14000 overall. I would rather have the water than worry about the slight difference in weight. We generally eat lunch in the trailer and use the bathroom most of the times.
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08-04-2015, 07:27 AM
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#20
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Rivet Master
2008 25' Classic
Full Time
, Texas
Join Date: Nov 2012
Posts: 4,309
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I'm more concerned what happens if you are boondocking and black and gray tanks are full and you have to tow back to a dump station over a forest road for 20+ miles. For my 25fb that would be roughly 600lbs.
Kelvin
__________________
2008 Classic 25fb "Silver Mistress"
2015 Ram 2500 6.7L Cummins. Crew Cab, 4x4, Silver
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