World’s Largest Engine, Pratt Ramps Up and Rolls Is Powering Up

The world of commercial aviation propulsion is in the midst of change, upheaval and dramatic new developments. Aviation Week’s senior editor Guy Norris recently visited General Electric, Pratt & Whitney and Rolls-Royce to see first-hand the production ramp ups and developments of new turbofans about to enter service. Listen in as he discusses his behind-the-scenes visit. Read the special report on propulsion in this week's edition of Aviation Week & Space Technology.