A commercial aircraft engine made by Pratt and Whitney.

the PW4000 is the largest and most powerful turbofan engine in the world, it comes in three versions the 112 inch (9 foot 4 inch) fan diameter version has a 6.4 to 1 bypass ratio and makes 98,000 pounds of thrust.

Those of you who are jet engine freaks out there like me can't help drooling over it

there are also 100 and 94 inch fan diameters respective bypass ratios are 5 to 1 and 4.8 to 1 and respective thrust ratings are 68,000 pounds and 62,000 pounds. All PW4000 engines have 180 minute ETOPS ratings and are expected to be certified for 207 minute ETOPS sometime soon.

Aircraft powered by the PW4000 112 inch:
Boeing 777-200/300
Aircraft powered by the PW4000 100 inch:
Airbus A330-200/300
Aircraft powered by the PW4000 94 inch:
Boeing 747-400
Boeing 767-200/300
Boeing MD-11
Airbus A300-600
Airbus A310-300

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