Pratt & Whitney has announced that its F117 engine program had logged more than four million flight hours of operation in the Boeing C-17 Globemaster III, covering airlift missions by the US Air Force and the British Royal Air Force. Four F117 engines power each C-17.
The rate of building B-21 bombers would speed up if the fiscal 2026 defense budget passes. But it remains unclear how much capacity would be added, and whether the Air Force would simply build the bombers faster, or buy more.
