
RTX's [RTX] Pratt & Whitney said on July 15 that it has completed preliminary design review (PDR) on the F135 Engine Core Upgrade (ECU) for the Lockheed Martin [LMT] F-35 fighter. Pratt & Whitney in East Hartford, Conn., said that ECU "is on schedule and exceeding expectations." "The upgrade will deliver increased engine durability and performance that will fully enable Block 4 and beyond capabilities for all three variants of the F-35 worldwide," P&W said in a statement. "During the…