Perhaps no single aircraft has changed Australia more than the 747, which opened up cheap international travel to millions of people.   In this week’s show, acclaimed aviation writer Jim Eames talks about his latest book, The Mighty 747, which examines how Boeing’s Jumbo Jet did it.   Eames tells host Adam Thorn why the aircraft is held in such affection by the industry, why Aussies are so fascinated with Qantas and whether double-decker aircraft have a future in the post-pandemic world.