Bit of a weird question.
If you going away, say america. and you want to fly of a Jumbo (747) Is there a way you can make sure you go on one, or is it just pot luck like? I have been on a Virgin Atlantic 747 before, and I wouldnt mind going on another 747.
if you access the timetables of most airlines, they usually show the type of aircraft normally assigned to a particular flight. eg virgin atlantic flight vs002 new york to london is shown to be an airbus 340.
Virgin would be your best bet because they only operate two different types of aircraft. The Boeing 747-400 and the A340 ( and soon the A380) Its a 50/50 chance but the other Airlines usually operate a big mix of Planes.