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Re: [GMCnet] Hitch mounted Motorcycle - Scooter carriers [message #326011 is a reply to message #325997] Tue, 14 November 2017 20:44 Go to previous messageGo to previous message
Ken Henderson is currently offline  Ken Henderson   United States
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma:
Senior Member
Hmmm...I'm not so sure about that "...back axle...fulcrum...". More
accurately, I think, the "rear axleS" act as a fulcrum. That is with the
OEM air bag distributing load between the center and rear wheels, causing
the actual "fulcrum" to lie at the bogie. With my 4-bag, or a Quad bag
suspension, the fulcrum would move aft from the bogie toward the rear as
the down force increased.

At least that's how it seems to me off the top of my head at this time of
night. :-)

Ken H.


On Tue, Nov 14, 2017 at 1:38 PM, John Phillips
wrote:

> Keith, you are correct. The back axle does act as a fulcrum and load
> applied to the hitch does remove weight from the front wheels. I was in the
> method of calculating the mode. Sorry.
>
> When doing the calculations in effect you do two torque calculations. The
> distance from the front axle to the hitch in feet multiplied by the
> tongue weight gives a value in foot-pounds.
> Divide the foot-pounds by the wheelbase in feet to come up with the force
> in pounds the rear axle must exert to support the tongue weight.
>
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
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