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Old 04-16-2016, 02:45 AM   #57
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Hi, jack the trailer up and put jack stands at the outer ends of the front axles, and inch by inch, move the jack stands forward under the frame until you have zero tongue weight. Now you have a point of where to load your trailer to lower or raise your tongue weight.
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Old 04-16-2016, 09:07 AM   #58
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I re-read OP's final question about "no effect on TW" and realized I was completely misunderstanding his question...or what he was trying to do. If he is wanting to know where to place individual items and how the placement affects TW, here is the formula.

Click image for larger version

Name:	weight dist pic.png
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ID:	260843


The above is the only graphic I had...so pretend the Suburban is my AS. The rear axle is the point midway between the AS axles and the front axle of the Suburban is the tongue jack on the AS. I use tongue jack as that is where most folks weigh the TW....but realize that if you want actual TW, defined as the weight resting on the ball, you will have to do a bit more math.

Assume a dead flat surface and an absolute level AS.

CGA = Distance from placement of object from the midpoint between the AS axles (fulcrum in our discussion)

WB = distance from jack to fulcrum

CGA divided by WB X100% = Percentage of weight of object on the jack


As an example with My AS:

WB = 214"

If I place a 150 pound object 24" in front of the fulcrum:

(24 divided by 214) X 100 = 11.2% is added to jack and 88.8 % is added to fulcrum..or 16.8 lb to jack; 133.2 lb to fulcrum

If I place a 150 pound object at the fulcrum:

(0 divided by 214) X 100 = 0% is added to jack and 100% is added to fulcrum..or 150 lb added to fulcrum and 0 lb added to jack

If I place a 150 pound object in the AS trunk 96" behind the fulcrum:

(-96 divided by 214) X 100 = -44.9% off the jack and 144.9% is added to fulcrum...or 67.4 lb REMOVED from jack and 217.4 lb added to fulcrum.

Maybe that's what you were looking for or maybe not??????
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Old 04-16-2016, 10:10 AM   #59
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Quote:
Originally Posted by dznf0g View Post
I re-read OP's final question about "no effect on TW" and realized I was completely misunderstanding his question...or what he was trying to do. If he is wanting to know where to place individual items and how the placement affects TW, here is the formula.

Attachment 260843


The above is the only graphic I had...so pretend the Suburban is my AS. The rear axle is the point midway between the AS axles and the front axle of the Suburban is the tongue jack on the AS. I use tongue jack as that is where most folks weigh the TW....but realize that if you want actual TW, defined as the weight resting on the ball, you will have to do a bit more math.

Assume a dead flat surface and an absolute level AS.

CGA = Distance from placement of object from the midpoint between the AS axles (fulcrum in our discussion)

WB = distance from jack to fulcrum

CGA divided by WB X100% = Percentage of weight of object on the jack


As an example with My AS:

WB = 214"

If I place a 150 pound object 24" in front of the fulcrum:

(24 divided by 214) X 100 = 11.2% is added to jack and 88.8 % is added to fulcrum..or 16.8 lb to jack; 133.2 lb to fulcrum

If I place a 150 pound object at the fulcrum:

(0 divided by 214) X 100 = 0% is added to jack and 100% is added to fulcrum..or 150 lb added to fulcrum and 0 lb added to jack

If I place a 150 pound object in the AS trunk 96" behind the fulcrum:

(-96 divided by 214) X 100 = -44.9% off the jack and 144.9% is added to fulcrum...or 67.4 lb REMOVED from jack and 217.4 lb added to fulcrum.

Maybe that's what you were looking for or maybe not??????
That is exactly it. The spreadsheet has 14 places where cargo can be located. For each location the distance to the tongue(ball) and the weight is entered. The ball-to-axle distance (what I was after) is entered elsewhere, and the spreadsheet calculates how much weight goes to the axle and how much goes to the tongue.
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Old 04-16-2016, 01:04 PM   #60
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How does this "spreadsheet" work when you are traveling down the non "dead flat" surface at 60-75mph? Where is that place on the road where the TV and coach are perfectly level?
I believe this is one of those places that "it works on paper" but in the "real world" the data won't match up.
And how do you prove your theory while the rig is moving?
How do you say to the authorities. "But officer, my spreadsheet says this can't happen" or "should not have happened"
Just sayin'
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Old 04-16-2016, 02:20 PM   #61
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Originally Posted by TG Twinkie View Post
How does this "spreadsheet" work when you are traveling down the non "dead flat" surface at 60-75mph? Where is that place on the road where the TV and coach are perfectly level?
I believe this is one of those places that "it works on paper" but in the "real world" the data won't match up.
And how do you prove your theory while the rig is moving?
How do you say to the authorities. "But officer, my spreadsheet says this can't happen" or "should not have happened"
Just sayin'

Not using it for trailer in motion- just using it to get a good estimate of what my axles would weigh at a scale, while stopped and level. For me, that scale is too far away and my driveway is too hard to get in and out of. If I can get the spreadsheet to come close to actual scale weights, then I am using it.

I am leaving this thread with this post, as I arrived at the answer I needed. I thought I worded my OP well enough so it didn't stretch out for 5 pages and I'm sorry that happened.
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