My guess is that except for a very small amount of additional friction from the bars, WDH's in general have little effect on causing or decreasing sway. That's why we have Dual-Cams, friction devices, etc. as add-ons (except in the case of those units, such as Equal-i-zer, where the anti-sway is built in to the design).
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Agreed. I wish we could stop using the term "tongue weight" once the TT is placed on the ball and the jack is cranked up.
I would propose something like: Tongue weight is the weight measured at the tongue determined by the total weight of the trailer, axle placement, and where loading is placed inside the trailer. 12% to 15% should be the desired tongue weight in order to minimize sway.
