United Kingdom, Feb. 24 -- Rolls-Royce announced the successful completion of altitude and operability testing for the F130 engine in another step towards delivering for the United States Air Force B-52J Stratofortress.Rolls-Royce conducted the testing at the U.S. Air Force Arnold Engineering Development Complex (AEDC) in Tullahoma, Tennessee, where Rolls-Royce engineering teams worked side-by-side with the Air Force to validate performance in demanding mission conditions.At AEDC, Rolls-Royce conducted altitude tests to demonstrate sustained performance for long-duration, high-altitude strategic missions; operability testing with distortion screens to replicate turbulent, real-world airflow and confirm engine stability under stress; and Int...