Pratt & Whitney says its ground-test F-35 Joint Strike Fighter engines have logged more than 4,000 system development and demonstration hours. The F135 jet engine is slated to power the F-35 in flight tests to begin next year.
The six-week government shutdown did not affect the hours flown by Air Force pilots, a service spokesperson told Air & Space Forces Magazine—avoiding what could have been a major blow at a time when flying hours are already lower than they have been in decades.
