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]

PW4000 (thing)