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Old 06-24-2007, 09:10 PM   #1
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Does anyone know the calculation to figure the uplift on the front axle due to weight behind the rear axle. I read it on here somewhere and can't find it.
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Old 06-24-2007, 09:10 PM   #2
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Does anyone know the calculation to figure the uplift on the front axle due to weight behind the rear axle. I read it on here somewhere and can't find it.
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Old 06-25-2007, 05:47 AM   #3
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I don't know where the previous post is but the answer is straight from physics. Determine the center of gravity for the weight behind the rear axle. Measure the distance from the center of gravity behind to rear axle to the rear axle. Multiply the weight behind the rear axle times (the distance of the CG from the rear axle) divided by (the distance from the rear axle to the front axle). The difficulty will usually be in finding the CG and knowing the weight behind the rear axle. If the definition of center of gravity is not clear, I can define it.
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Old 06-25-2007, 05:52 AM   #4
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I think what you are looking for is on the Blue Ox towing products site. There is a formula there for figuring out the weight added to the rear axle and removed from the front axle when installing a motorcycle lift on the back of your MH.
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Old 06-25-2007, 01:10 PM   #5
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It can be calculated as Jim Walker describes, but it's a whole lot easier to just weigh the coach front and rear afterwards.
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Old 06-25-2007, 01:23 PM   #6
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Hi Gary

I believe they are trying to find out before hand if it is a good idea.

Not weighing until after the job is done is a little late if it takes too much weight off the front and makes it unsafe to drive.
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Old 06-27-2007, 09:49 AM   #7
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I hear ya, but you can shift or add weight to the front end if needed. Biggest question is whether there is sufficient rear axle capacity left to handle the extra weight. Many coaches are already near their rear axle limit.
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