They’re massive pieces of engineering that seem to defy physics as they hang in the air during takeoff and landing, but double-decker passenger airplanes — the Boeing 747 and Airbus A380 ...

Airbus only had the A300 and the slow-selling A310, while Boeing was selling a full line-up consisting of a redesigned 737, the 757, as well as the popular 747 and 767 widebodies. The Airbus A320 ...