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What kind of engines used in Boeing 797?

The Boeing 797 is a proposed aircraft, not yet in production. As such, there are no confirmed engine choices for it. However, several potential engine options are being discussed:

* GE Aviation's GE9X: This engine is already powering the Boeing 777X and could be a strong contender due to its proven performance and efficiency.

* Rolls-Royce's UltraFan: This new engine design focuses on fuel efficiency and is specifically targeting the next generation of widebody aircraft.

* Pratt & Whitney's GTF Advantage: This engine is known for its fuel efficiency and reduced noise levels, making it another possible candidate.

It's important to note that these are just possibilities and Boeing hasn't made any official announcements regarding engine selection for the 797. The final engine choice will likely depend on factors like performance, cost, and availability.