There’s a simple fix you get a barometric pressure reading and you reset the Bellows of the engine before flight and then they’ll burn clean. See that navy has the aircraft that has the same engine. It was the A3 engineer and I worked at AMD so I was authorized to make those adjustments.
They are getting new engines. It could fly far with the old engines. It will fly even further with new technology. Almost nothing on the planes are original. The b52’s that are flying are the last ones that were built.