1. FLEET COMMONALITY. IF YOU HAVE A FLEET OF ROLLS POWERED AIRCRAFT, YOU CAN CUT DOWN ON A & P TRAINING, SPARES, ETC.
2. DON'T FORGET BMW HAD SOME PART IN THIS, I DON'T EXACTLY KNOW WHEN THEY CAME ON THE SCENE, BUT EVER SINCE I CAN REMEMBER (TWO OR THREE DAYS....) RELIABILITY NUMBERS HAVE BEEN CITED WITH RB211'S IN VARIOUS ITERATIONS.
