How does the C5 compare to the 747 sizewise? What about the Russian 6-engine Antonov that carries the Buran? Has a train of 14 wheels in each main gear set.

On a trip back from Asia on a 747-400, they had a GPS type display going. With the tailwind the display read 704 mph max. I dare say that's the fastest I've gone relative to the surface of the earth. Not sure how accurate that is since my wife managed to record a max speed of 350 mph in our portable GPS nav unit in a lowly minivan

Sixto