Pratt & Whitney has proposed upgrade package for B-52’s TF33 engine

While waiting for the U.S. Air Force to decide whether to change the B-52H’s engines, Pratt & Whitney has gone ahead to propose an upgrade package that will improve the fuel and maintenance performance of its existing TF33 turbofan.

By Ronnie Macdonald from Chelmsford, United Kingdom [CC BY 2.0], via Wikimedia Commons