Ever heard of the Y2K? it is a motorcycle that has a jet engine, they clocked it going 240 mph on a airport tarmac as a test... they said that is not even the top speed of it, they have no clue how fast it could go.
Careful... I made a 1 1/2 foot model of it for art class many MANY years ago (got 2nd place in an art contest) somebody called it an outhouse the art teacher got so mad they threw them out of the classroom.