nimbusgb wrote:

If you have an airfoil shaped fin box on the trailer try fitting a
'spoiler strip' to either side of the finbox!

I had a ventus B Turbo in a Komet II trailer that used to quietly
dance behind what was normally a perfect tow vehicle. The sway was
usually kicked off by a passing car or when overtaking a big rig or
bus on the motorway. Taping 2 25 mm aluminium right angles about 1m
long, vertically about 100mm behind the leading edge of the fin box
killed the horizontal lift on the box and transformed the handling.

I often got some very strange looks from other club members about it
but I swear it worked a treat.

Do you have any photos of this installation? I'm wondering if it'll
help settle down my Komet.

Jeremy