anybody transport fuselage on top of car?
It should work fine. Just make sure it is firmly attached. Most bikes and luggage carriers weigh much more than our planes. I have wondered about this myself. If you use a bellcrank for the rudder, you may want to make a pin to lock things in place during the drive. I seen a lot of things worse than a plane on top of a car. There was another post about this months ago that may help you.
ML