The U.S. Air Force has requested funding and authorization from Congress to launch one of the largest military reengining programs since the Boeing KC-135R Stratotanker. The service’s fiscal 2019 budget request seeks more than $1 billion through fiscal 2023 for a Boeing B-52 Stratofortress propulsion system replacement program. The initiative would replace the Pratt & Whitney TF33-103, which has powered the H-model B-52 since its introduction in 1960. But unlike the ...

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