Originally Posted by MTDSilver71
That is awesome! Never saw a rumble seat as a gooseneck hitch point before.
The trailer is a Curtis Aerocar and the "fifth wheel" was literally a fifth wheel (actually an aircraft wheel and tire surrounded by a cast metal bracket).
The aired tire as part of the hitch gave protection from road jolts and bumps in the tow vehicle.
These rigs were for the elite...and were made on aircraft principles.
The fifth wheel hitch has evolved into something less elegant, but it serves the same purpose in a very similar way.