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Old 10-20-2013, 07:39 PM   #61
Senior Member
Join Date: Dec 2012
Location: Edmonton, Alberta
Trailer: 1979 Boler B1700
Posts: 7,242
Originally Posted by cpaharley2008 View Post
I know when I measure my tongue weight at the jack vs on the tongue there is a 20# difference for that little space, so it may affect the weight difference even more over the longer distance from the interior dinette to the exterior box and from one side to center.
Jim, you're talking about changing the location of the entire force holding the tongue up by a foot; this is a much bigger effect than changing the location of just the batteries by a similar distance. In this example, moving about 10% closer to the centre of the trailer's mass increases the force needed to support the tongue about 10%, or 20 pounds.

If anyone is really interested, it is reasonably easy to calculate the exact effect of moving a known weight of stuff (batteries in this case) from a known location to another other known location... but you need some measurements to start with.

Brian B-P is offline   Reply With Quote

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