[user removed]

Originally Posted by euromodder

Make the external plating move over the circular shaped front of the trailer.
Sort of what Aerohead is doing with his streamlined trailer.
By carefully locating the covering plates and the circular front in relation to the kingpin, you'd only need to cater for minor deviations - mostly those caused by both parts of the rig heaving and diving or flexing.

Fish scales.
regards
Mech