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Old 11-20-2007, 07:12 AM   #1
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another tongue weight/height question

read somewheres,
angling the a/s nose high, increases tongue weight load
angling nose down, decreases tongue load...

is that possible? (seems counter-intuitive)

i know from my own 'testing'- (when fully hitched) the drive axle weight increased as i raised the ball height, and decreased as i moved the ball height to lower settings.

at the time, i attributed this to the torsion bars having less/more effectiveness (using equalizer brand)
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Old 11-20-2007, 08:17 AM   #2
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I had posted this question last week as part of my investigation regarding a sway problem with my new Excursion. The type of axle Airstream uses, torsion bar, does not allow for any type of weight distribution between the axles if the trailer frame is other than level to the ground. Given that factor the ball height can change the dry measured tongue weight and thus change the effective load on the TV. Yes increasing the height of the tongue will increase the dry tongue weight because you are actually lifting the front axle and thus cause the center of load on the axles to move backwords.

Note I mentioned dry tongue weight. Once you include weight distributing bars net effect on the TV is a function of the hitch head angle and the load on the bars.

While no one would recommend towing with the tongue excessively high or low the fact that there are generaly only 1 in. increment in hitch height gives one a reason to select one or the other. Choising to tow tongue low would lessen the effective tongue weight on the tow vehical and thus could drop you below the recommended 10 to 12% of the trailer weight load on the TV.
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Old 11-20-2007, 08:19 AM   #3
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It makes sense to me; if you raise the tongue and most of the trailer weight is on the rear wheels of the tandems, it would result in more tongue weight AND you rear tandems would be carry more load.

I think that level is best; tandem wheels were meant to share the load equally.
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Old 11-20-2007, 08:58 AM   #4
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Quote:
Originally Posted by HowieE
Choising to tow tongue low would lessen the effective tongue weight on the tow vehical and thus could drop you below the recommended 10 to 12% of the trailer weight load on the TV.
unless you're looking to reduce the tongue weight....

i've got a good 1500-1600lb tongue weight on my s/o
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Old 11-20-2007, 09:08 AM   #5
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Quote:
Originally Posted by finalcutjoe
unless you're looking to reduce the tongue weight....

i've got a good 1500-1600lb tongue weight on my s/o
What are you towing with that weight? Where are you measuring the weight?
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Old 11-20-2007, 12:04 PM   #6
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its an '08 classic 30' slide
full fresh water, LP, and cargo

the only tongue weight i was able to get, was in my drive, and the nose was well high- 1500lbs (sherline scale)

the only other scenario is in the winter storage yard (perfectly level), no holding tanks, no water, no LP, no cargo, with both batteries was 950lbs
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Old 11-20-2007, 12:37 PM   #7
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In order to get a Good Weight you have to find a level platform, scale surface or old building concrete floor, and have the trailer level at the time the weight is taken. On a Cat Scale that easy, just have the wheels on one plate of the scale and the tongue on another. The scale weights will give you tongue weight and tongue weight. If you are using an old floor you can set up a beam system with a bathroom scale. Just make sure the trailer is level at the moment you take your reading. Depending on your beam ratio the scale reading time the times the multipling factor will give you the tongue weight.
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