Rolls-Royce is retiring its Boeing 747-200 "Flying Test Bed" (FTB), registered N787RR, after 20 years of service since 2005. The uniquely modified aircraft, capable of flying with five engines, was ...

From the outside, when mounted on a commercial jetliner and covered in a cowling, it can be hard to tell the differences between any of the modern turbofan engines that they use. Two of the largest ...