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I'd like to understand this. Is it in reference to crosswinds hitting the trailer and "lifting" it 90-d to the direction of travel? That seems to be my misunderstanding, here, as my impression of that is that the wind does not "pile up" against the trailer sides as it does with a sharp-edged trailer.
If we speak of winds in the direction of travel I'm still at a bit of a loss. Yes, a square-front trailer has some "built-in" anti-sway (sheer resistance to direction of travel) over a "shaped" front (radiused edges) . . but I'm having a hard time with the claim that it is significant in trailer directional stability. Experience, etc, all otherwise mitigate this claim.
Maybe . . that even a bit of anti-sway via hitch rigging is enough to offset any tendency of this sort.
That's as close as I can come.
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