Originally Posted by David472
snip.......I've been told, this was because the wind was pushing down on the roof of the trailer, increasing the tongue weight, thus raising the front wheels of the TV. Maybe being high at the front of the trailer would have the opposite effect?.....snip
Interesting observation that I have not considered before, so my comments will be me just thinking out loud.........;
I've been in discussions on the "drag effect" that a TT front cap can produce in concert with head winds, cross winds, etc., but not an actual "downward" effect under similar conditions.
Responding to the condition as you described, I remain open minded and IMO wind effects can influence TV/TT handling in many different ways......, some noticeable, some not. Different TV suspensions, TV wheel base lengths, TV tires, TT lengths, weights, type of WDH, may react differently under the same condition you described.
Assuming that an actual downward wind force was taking place on the TT as you describe, I think it would be unlikely that the ending effect could remain a constant while towing. Also, under the same conditions the TT tongue weight on the hitch ball wouldn't actually increase because of the reactive movement of the WDH flexing as a whole unit. This WDH flexing condition (WDH leverage effect through TV receiver) would be similar to hitting bump in the road resulting in a reaction of the TV's front suspension.
In regards to the TT being tongue high we all know is a major contributor to TT sway, and I have not heard that a downward wind effect would reduce this potential for a sway event.
I would summarize and say that not all TV/TT combinations are created equal, and they all have their own sweet-spot when it comes to "dialing-in their respective WDH.
One thing for sure, a TT is about as aerodynamic as a cement cinder block!