If you are travelling around the world in a convoy of different vehicles, the order and spacing in which they drive along will have a significant effect on fuel economy.
Today’s invention is a program which calculates the drag on a convoy of any combination of common vehicles.
You would enter eg ‘Three Ford transits, a Mini, two Volvo FH16s and a BMW R 1250 GSA’. The program would then spit out the best order and recommended spacings.