patented product is Reese Products main technique for controlling trailer
sway. Unlike the friction sway control, this approach works to control
sway from the start rather than just resisting sway once it's begun and it
works only when needed. When towing in a straight line, the cams on either
side of the trailer A-frame are locked in position. This essentially
creates a "rigid" connection between tow vehicle and trailer and
minimizes the effects of induced sway caused by high cross-winds or
the cams ride in a detent locked-in position, even on fairly sharp curves.
However, when cornering maneuvers are required, the cams automatically
slide out of their detent to permit full radius turns. Yet when the
maneuver is short and abrupt, like that encountered in the event of a
sudden swerve or a wheel dropping off the road, the cams seek a
straight-line towing angle that helps the tow vehicle retain control.
advantage of the dual cam system is its ability to forestall sway in
addition to sway resistance. It works to hold down the start of swaying
activity while at the same time allowing free and easy vehicle and trailer
interaction. Another advantage of the dual cam system is that it's
installed on the trailer and therefore doesn't require adjustment every
time the towing vehicle and trailer are hooked up, unless hitch weight or
tow vehicle loading are changed.