In this fascinating 30-second video you’ll see why weight distribution on a trailer matters so much. Watch what happens when the weight on the scale model trailer is shifted and what a dramatic difference it can make in whether the trailer tows safely or can easily get out of control.
Possibly erroneous test video. How many trailers do you see with the axle dead center in the middle of the unit and with such a long, long rear overhang? I’d guess only poorly built home-made stuff. It surely exaggerates the effects of incorrect loading and maybe that is the point, but it is obviously misleading. If that’s the point, it accomplishes it fine, but maybe a disclaimer about design geometrics of the testing apparatus would be useful. Thanks for highlighting this common problem.