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Pratt & Whitney and GE complete design reviews for USAF NGAP program

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Pratt & Whitney and GE complete design reviews for USAF NGAP program
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Pratt & Whitney division of RTX Corporation | Official Website

Pratt & Whitney, a division of RTX Corporation, and General Electric have completed the detailed design reviews (DDRs) for their XA103 and XA102 adaptive cycle engines. These engines are part of the United States Air Force's Next-Gen Adaptive Propulsion (NGAP) program, which aims to power the USAF’s Next Generation Air Dominance fighter jet.

An adaptive cycle engine, also known as a variable cycle engine, can provide both high thrust and cruise efficiency by utilizing a third bypass duct. This feature allows for increased cruise efficiency or more superheated air for take-offs and combat scenarios.

Both Pratt & Whitney and General Electric are leveraging previous work from the Adaptive Engine Transition Program for the F-35. Although neither company's engine was selected at that time, the designs have evolved into GE’s XA102 and Pratt & Whitney’s XA103.

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On February 19, both companies announced they had completed DDRs based on complex computer models. Jill Albertelli, President of Pratt & Whitney's Military Engines business, stated: "The significance of this first fully digital review cannot be understated. Digital processes throughout the lifecycle are crucial to rapidly and efficiently deliver advanced warfighter capabilities."

General Electric's Dr. Steve “Doogie” Russell highlighted that "XA102 is the first engine in GE Aerospace’s history to be developed using model-based systems engineering (MBSE)." He added that this approach would continue as they move into procurement and build phases.

Chris Flynn from Pratt & Whitney emphasized propulsion as a key differentiator for U.S. military capabilities: “For decades, propulsion has been a key differentiator for the United States." David Tweedie from GE Edison Works echoed this sentiment at an industry conference: “What they don’t have today is an advantage in capability and propulsion capability."

As these engines move toward full-scale demonstration later this decade, maintaining American airpower superiority remains a priority.

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