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.
With a repeat of a hypersonic missile test coming up in the summer and the potential to speed up production of the B-21 Raider, the Air Force is “committed” to putting hypersonic missiles on its long-range bombers, said Lt. Gen. Duke Z. Richardson, the top USAF acquisition official. Air Force…