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05-23-2011, 03:07 PM
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#1
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one of those
2011 27 FB International
'03 F250 PSD
, Airstream summers, Catalac winters
Join Date: Apr 2011
Posts: 1,091
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WDH explanations for the terminally dumb?
As a new AS owner, I am trying to learn as much as I can before striking off for the great...whatever.
I have been reading everything I can find on the weight distributing hitches I keep hearing about. I know I am just a dumbass old East Texan, but I still don't understand this.
The literature, like in this explanation;
HowStuffWorks "Installing Towing Weight Distribution Systems"
says that the hitches distribute the weight equally among the axles of the trailer and the towing vehicle. But I can't figure this out, since no matter how much additional stuff you bolt onto the trailer tongue....it STILL puts it's weight on the exact same place on the towing vehicle, which is in that receiver tubing.
Do any of y'all know of another explanation that I might try to read to see if it makes more sense to me? I've read this one three times, and it doesn't explain how this thing works, exactly. It says it works, but it doesn't say how.
I am just not understanding how bolting a hundred pounds of iron to the trailer frame levels out the truck. Wouldn't it just be cheaper to add lead to the rear bumper of the trailer, like trim weights? Or move the axles forward?
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05-23-2011, 03:23 PM
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#2
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Lost in America
2015 27' FB International
2006 25' Safari FB SE
2004 19' International CCD
Santa Fe
, New Mexico
Join Date: Feb 2007
Posts: 2,152
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Works like trim tabs on your boat. Distributes more weight to the TV front axle and the rest rides on the TT axles
__________________
This is the strangest life I've ever known - J. Morrison
2015 Airstream International Serenity 27FB
2017 Chevy Silverado 2500HD Duramax Diesel
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05-23-2011, 03:25 PM
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#3
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Rivet Master
2006 23' Safari SE
Holly Lake Ranch
, Texas
Join Date: Sep 2010
Posts: 1,794
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As best as I can figure . . .
welcome to the club. I totally don't understand the physics of it but hey I was a liberal arts major. As best as I can figure its some type of lever and fulcrum arrangement on wheels. Maybe Bill Nye the Science Guy needs to get an AS so he can put it in simpler terms.
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05-23-2011, 03:30 PM
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#4
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Rivet Master
2007 28' International CCD
Springfield
, Missouri
Join Date: Apr 2011
Posts: 1,423
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Go to the Equalizer hitch website they have a great video that will show you and explain how they work.
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05-23-2011, 03:57 PM
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#5
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Rivet Master
, Minnesota
Join Date: Aug 2003
Posts: 7,721
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Imagine a ladder bolted to the bed of your truck. If you sit on the back end of the ladder, it acts like a see-saw with the center at the rear axle. You remove some of the weight from the front tires.
Now if you pull up on the ladder you add some weight to the front tires. In it's simplest form thats what a weight distributing hitch does.
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05-23-2011, 04:18 PM
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#6
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4 Rivet Member
2007 27' Safari FB SE
LONDON
, ON
Join Date: Dec 2006
Posts: 276
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Or think of it like the handles on a wheelbarrow. Lifting the handles transfers the weight to the front wheel and away from the rear supports.
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05-23-2011, 04:46 PM
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#7
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Retired.
Currently Looking...
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, At Large
Join Date: Jun 2003
Posts: 21,276
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Okay, the weight bars, when pulled up by the chains on the tongue of the trailer, use the trailer ball as a fulcrum to pivot forward and back, forcing the weight back onto the front tow vehicle axle and the trailer axles. Remember the quote about getting a lever long enough and something to stand on, and being able to move the world? Same thing. You're using those bars as a lever to force the front end back down, putting more weight on it.
__________________
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
Terry
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05-23-2011, 08:31 PM
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#8
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steel/aluminum fabricator
2004 22' International CCD
Penticton
, British Columbia
Join Date: Oct 2010
Posts: 133
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Here's some professional artwork to convey forces acting on the tow vehicle when using an equalizer hitch. Point A is attached to the top of the eq hitch. Point B is attached to bottom of eq hitch. When you pull up on C which is the draw bar, the forces act on A pushing the top of EQ hitch forwards and pulls B backwards thus pushing the front of the tow vehicle down. Its all about leverage.Hope this helps a bit.
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05-23-2011, 08:54 PM
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#9
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"Cloudsplitter"
2003 25' Classic
Houstatlantavegas
, Malebolgia
Join Date: Jun 2007
Posts: 20,000
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Think of it kind'a like this.....
__________________
I’m done with ‘adulting’…Let’s go find Bigfoot.
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05-23-2011, 09:05 PM
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#10
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Rivet Master
2006 23' Safari SE
Holly Lake Ranch
, Texas
Join Date: Sep 2010
Posts: 1,794
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Overadjusted . . .
That rear axle on the steer looks just a bit high . . . but clearly the tow vehicle has great brakes.....
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05-23-2011, 09:10 PM
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#11
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Rivet Master
2012 25' Flying Cloud
Battle Lake
, Minnesota
Join Date: Jun 2009
Posts: 7,714
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One more question. The actual weight of the trailer on the ball. Is that weight reduced by the lifting of the weight distribution bars?
Or to put it another way, is a truck's receiver rated at 800 lbs able to carry more than 800 lbs when a w.d. hitch is used?
Doug K
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05-23-2011, 09:20 PM
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#12
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"Cloudsplitter"
2003 25' Classic
Houstatlantavegas
, Malebolgia
Join Date: Jun 2007
Posts: 20,000
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Quote:
Originally Posted by dkottum
one more question. The actual weight of the trailer on the ball. Is that weight reduced by the lifting of the weight distribution bars?
Or to put it another way, is a truck's receiver rated at 800 lbs able to carry more than 800 lbs when a w.d. Hitch is used?
Doug k
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.....No.... 800 is 800
__________________
I’m done with ‘adulting’…Let’s go find Bigfoot.
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05-23-2011, 09:39 PM
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#13
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Rivet Master
2005 25' Safari
Salem
, Oregon
Join Date: Mar 2006
Posts: 8,376
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Quote:
Originally Posted by dkottum
One more question. The actual weight of the trailer on the ball. Is that weight reduced by the lifting of the weight distribution bars?
Or to put it another way, is a truck's receiver rated at 800 lbs able to carry more than 800 lbs when a w.d. hitch is used?
Doug K
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Quote:
Originally Posted by ROBERT CROSS
.....No.... 800 is 800
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Hi, I will say yes and no. On your receiver, there are usually two sets of weights for trailer towing and tongue weight; The higher of the two is for, when using, a WD hitch.
__________________
Bob 2005 Safari 25-B
"Le Petit Chateau Argent" Small Silver Castle
2000 Navigator / 2014 F-150 Eco-Boost / Equal-i-zer / P-3
YAMAHA 2400 / AIR #12144
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05-23-2011, 10:33 PM
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#14
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Rivet Master
Currently Looking...
Sioux Falls
, South Dakota
Join Date: Jun 2010
Posts: 2,403
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I saw a drunk ventriloquist get in an argument with his left hand once. I think it may be possible to add tow vehicle weight to the hitch by improper loading the tension bars. I may be wrong.
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05-24-2011, 05:30 AM
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#15
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one of those
2011 27 FB International
'03 F250 PSD
, Airstream summers, Catalac winters
Join Date: Apr 2011
Posts: 1,091
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Ah thanks, Zedex, the diagram helps a lot. So basically the swing arm things are acting as a truss across the hinge between the trailer hitch and the ball.
It's still not totally clear how this works vertically, but it's getting a lot clearer.
And I don't mind a little bull slinging, either. But be careful what you start. I'm ex TYRA and know a dogging heel from an RCA crown.
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05-24-2011, 05:30 AM
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#16
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"Cloudsplitter"
2003 25' Classic
Houstatlantavegas
, Malebolgia
Join Date: Jun 2007
Posts: 20,000
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Tow, carry
Quote:
Originally Posted by ROBERTSUNRUS
Hi, I will say yes and no. On your receiver, there are usually two sets of weights for trailer towing and tongue weight; The higher of the two is for, when using, a WD hitch.
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Oh Robert.... nit,nit,nit.
Now you've really cornfused the Loan Star.
We're now saying you can tow more weight with the WD, but not "carry" more.
__________________
I’m done with ‘adulting’…Let’s go find Bigfoot.
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05-24-2011, 05:33 AM
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#17
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one of those
2011 27 FB International
'03 F250 PSD
, Airstream summers, Catalac winters
Join Date: Apr 2011
Posts: 1,091
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Loan Star? ha ha. And thank you. We all know that there are basically two types of people in the world. Native Texans, and people who secretly wish they were native Texans.
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05-24-2011, 05:36 AM
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#18
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"Cloudsplitter"
2003 25' Classic
Houstatlantavegas
, Malebolgia
Join Date: Jun 2007
Posts: 20,000
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Quote:
Originally Posted by Gringo
Loan Star? ha ha. And thank you. We all know that there are basically two types of people in the world. Native Texans, and people who secretly wish they were native Texans.
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Austin...the best music city in the Country.
__________________
I’m done with ‘adulting’…Let’s go find Bigfoot.
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05-24-2011, 05:48 AM
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#19
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one of those
2011 27 FB International
'03 F250 PSD
, Airstream summers, Catalac winters
Join Date: Apr 2011
Posts: 1,091
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I went to UT, lived in Austin from 69-71, then back in 77 for some more. now, I detour through there at every opportunity to check up with old friends from the 60's and 70's. I well remember Armadillo World Headquarters, Oat Willies, Zilker Park, Greasy Wheel, Threadgills....
I hear I had a real good time. Reports are still filtering in.
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05-24-2011, 06:19 AM
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#20
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"Cloudsplitter"
2003 25' Classic
Houstatlantavegas
, Malebolgia
Join Date: Jun 2007
Posts: 20,000
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Quote:
Originally Posted by Gringo
I well remember Armadillo World Headquarters, Oat Willies, Zilker Park, Greasy Wheel, Threadgills....
I hear I had a real good time. Reports are still filtering in.
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One Tequila, Two Tequila, Three Tequila....Floor. BTDT
I love The Lone Star!!
__________________
I’m done with ‘adulting’…Let’s go find Bigfoot.
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