Rolls-Royce stopped producing narrowbody engines more than a decade ago. Embarrassingly, this meant the company completely missed a boom in demand for best-selling aircraft such as the Boeing 737 and Airbus A320.The German advances have come at a critical moment, just as Rolls is considering a return to the fast-growing market for “narrow-body” planes, which have a single aisle and are used by carriers such as Ryanair for short-haul flights.“It’s a very sensible thing for Rolls-Royce to consider – and poten ...