Boeing 747: The Original Jumbo JetBoeing's 747 'heavy' has achieved a fifty year reign of the airways, but now airlines are retiring their fleets as a different type of long haul airliner emerges. Yet the ultimate development of the 747, the 800 model, will ply the airways for many years to come. Even as twin engine airliners increasingly dominate long haul operations and the story of the four engine Airbus A380 slows, the world is still a different place thanks to the great gamble